RDS vs Compiler

We just migrated our database from SE to Online 6.0. We were using RDS for the SE and now we are using compiler version for Online. The problem is , when a pop up window is displayed, and the user selects a value from the pop up, the value would populate the appropriate field on the Screen Form. This worked fine in RDS, but now with the compiler version, the value does not always populate the field on the Screen Form. Sometimes the field is populated for a split second, then dissapears, sometimes the field is populated for a split second, dissapears, then after pressing RETURN, cursor moves to next field, the previous field value re-appears. Sometimes the field is not populated at all and the variable no longer has a value. This seems to be a consistent problem through out the application. Is anyone familar with this problem or are aware of any anomalies between the RDS version and the Compiler Version, please either e-mail me or post a message. Thanks Chris