Study in Patients With Crohn's Disease Who Are Steroid Dependent, Despite Previous Unsuccessful Attempts to Reduce Steroids Due to Worsening of Crohn's Disease

Inclusion Criteria: * You must have active Crohn's disease at screening and been diagnosed with Crohn's disease within 6 months at screening. * You must have steroid dependent disease (receiving between 10-40 mgs/day prednisone therapy for greater than 3 months prior to screening and had at least one unsuccessful attempt to reduce cortico-steroids due to worsening of disease). * You must be able to give yourself an injection of study drug or have another person help you give the injection. * You must not be pregnant and agree to use birth control if you are a sexually active male or female of childbearing potential. Exclusion Criteria: * You may not be taking medications not allowed on this study. * You may not have had GI surgery or bowel obstruction in the last 6 months. * You may not have ever taken this drug or drugs of similar type in the past.