Study of AUY922 in Metastatic Pancreatic Cancer Who Are Resistant to First Line Chemotherapy

Inclusion Criteria: * Histologically or cytologically confirmed diagnosis of adenocarcinoma of the pancreas with metastatic disease * Patients have received at least one prior systemic anticancer therapy for their advanced disease, which may include a gemcitabine based or 5-FU based therapeutic regimen. Patients with resected disease who relapse within 6 months of completion of adjuvant gemcitabine would also be eligible. * Patients with progressive disease (radiological confirmation required) after at least one line of chemotherapy for pancreatic adenocarcinoma. Patients must have at least one measurable lesion as defined by RECIST criteria. Irradiated lesions are only evaluable for disease progression. * Patient's age is ≥ 18 years of age * Patients may have received prior radiation treatment for management of local disease providing that disease progression has been documented, all toxicities have resolved, to ≤ grade 1 and the last fraction of radiation treatment was completed at least 4 weeks prior to randomization (2 weeks for palliative radiotherapy). * ECOG performance status of 0 or 1. * Life expectancy of greater than 12 weeks * Patients must have following laboratory values within 7 days prior to starting treatment: * Hematological: * Absolute Neutrophil Count (ANC) ≥ 1.5 x 109/L * Hemoglobin (Hgb) ≥ 90 g/L * Platelets (plt) ≥ 100 x 109/L * Biochemistry: * Potassium within normal limits * Total calcium (corrected for serum albumin) and Phosphorus within normal limits * Magnesium above LLN or correctable with supplements * Adequate liver function defined as: * AST/SGOT and ALT/SGPT ≤ 1.5 x Upper Limit of Normal (ULN) * AST/SGOT and ALT/SGPT ≤ 2.5 x Upper Limit of Normal (ULN) if liver metastases are present * Serum bilirubin ≤ 1.5 x ULN * eGFR ≥ 50 mL /min * Women of childbearing potential (WOCBP) must have a negative serum pregnancy test (minimum sensitivity 25 IU/L or equivalent units of HCG) within 72 hours prior to randomization. Postmenopausal women must have been amenorrheic for ≥ 24 months in order to be considered "of non-childbearing potential". This should be documented appropriately in the patient's medical history. Exclusion Criteria: * Patients with a history of another primary malignancy that is clinically significant or requires active intervention * Prior treatment with any HSP90 or HDAC inhibitor compounds, including valproic acid * Patients with a significant history of cardiac disease, including: * Impaired cardiac function, including any one of the following: * History (or family history) of long QT syndrome * Mean QTc ≥ 450 msec on baseline ECG * History of clinically manifested ischemic heart disease ≤ 6 months prior to study start * History of heart failure or left ventricular (LV) dysfunction (LVEF ≤ 45%) by MUGA or ECHO * Clinically significant ECG abnormalities * History or presence of atrial fibrillation, atrial flutter or ventricular arrhythmias including ventricular tachycardia or Torsades de Pointes * Other clinically significant heart disease (e.g. congestive heart failure, uncontrolled hypertension, history of labile hypertension, or history of poor compliance with an antihypertensive regimen) * Clinically significant resting bradycardia (\< 50 beats per minute) * Patients who are currently receiving treatment with any medication which has a relative risk of prolonging the QTc interval or inducing Torsades de Pointes and cannot be switched to an alternative drug or discontinued prior to commencing start of treatment. * Obligate use of a cardiac pacemaker * Patients with a serious active infection at the time of registration or other serious underlying medical conditions that would impair the ability of the patient to receive protocol treatment. * Patients with a known central nervous system metastases. CT scan of the brain is NOT required unless there is suspicion of CNS metastases. * Patients with any condition (e.g. psychological, geographical, etc.) that does not permit compliance with the protocol. * Pregnant or lactating females. * Women of child bearing potential or sexually active males who are not employing adequate contraception. Adequate methods of contraception include use of oral contraceptives or Depot-Provera, with an additional barrier method (diaphragm with spermicidal gel OR condoms with spermicide); a double-barrier method (diaphragm with spermicidal gel AND condoms with spermicide); partner vasectomy and total abstinence. * Patients who received systemic anti-cancer treatment prior to the first dose of study medication within the following time frames: * Radiotherapy, conventional chemotherapy: within 4 weeks * Palliative radiotherapy: within 2 weeks * Monoclonal antibodies: within 4 weeks * Nitrosoureas and mitomycin: within 6 weeks * Targeted agents or investigational dugs: within 4 weeks * Patients who have had any surgery within 2 weeks prior to registration or who have not recovered from such therapy. * Patients known to be HIV positive. Testing is not required in the absence of clinical signs and symptoms suggestive of HIV infection. * Treatment with therapeutic doses of coumarin-type anticoagulants. (Maximum daily dose of 2 mg, for line patency permitted) * Patients with known disorders due to a deficiency in bilirubin glucuronidation (e.g. Gilbert's syndrome) * Unresolved diarrhea ≥ CTCAE grade 2 within 72 hours prior to registration * Patients with acute or chronic renal disease. Chronic renal disease will be defined as patients who have stable creatinine ≥ to 1.5 ULN and/or eGFR ≤ 50mL/min. Acute renal disease will be defined as patients that have an acute (within less then 4 weeks) rise in creatinine to ≥ 1.5 ULN and/or eGFR ≤ 50mL/min, that has not resolved to the previously normal baseline levels. * Patients with active liver disease that requires intervention. * Patients who cannot give informed consent (i.e. mentally incompetent patients, or those physically incapacitated such as comatose patients). Patients competent but physically unable to sign the consent form may have the document signed by their nearest relative or legal guardian. Each patient will be provided with a full explanation of the study before consent is requested.