A Switch Study of BMS-337039 in Schizophrenic Out-patients

Inclusion Criteria: * Patients with a diagnosis of schizophrenia as defined by DSM-IV-TR2 criteria * Out-patients who have been taking Risperidone for minimum 6 weeks who are not optimally controlled and/or experiencing safety/tolerability issues with Risperidone * Men and women, aged 18 - 65 years Exclusion Criteria: * Patients who are at risk for committing suicide * Patients with a diagnosis of schizoaffective disorder, bipolar disorder, depression with psychotic symptoms, or organic brain syndromes * Meeting DSM-IV-TR criteria for any significant Psychoactive Substance Use Disorder within the 3 months prior to Screening * Treatment-resistant to antipsychotic medication