[nick.polites]

Ok since view scheduled jobs works then I would say you are connecting to the Oracle Reports server correctly. If you run other out of box (not custom) reports do they work? I'm guessing you have a setup issue with this custom report if the out of box ones work. You'll need to check the log files to try to figure where the problem is.
One additional thing I found out is that Oracle Reports has a scalability feature in which it will try other reports instances on the same network if the report server instance is the same i.e. Reports_OTM_55 on two different servers. This has caused a great deal of pain until I figured out what was going on. Keep that in mind as well.