Apps 8.0.3 lsf 9.0.0 to Apps 9.0.0 lsf 9.01

I am in the process of migrating our custom programs from applicaton 8.0.3, env lsf 9.0.0.4 to application 9.0.0, env lsf 9.01. We have a custom process that lists on a form the available pay codes for the position class (this also includes a custom table with a relation to the PACLASS table).  The form is in the pr system code and accesses the PACLASS table, POSITION-CLASS field as a select.  I am able to successfuly compile the program.  When I access the form, I am unable to have a selection available on the Position-Class field - the screen returns 'select is not available for this field'. On the form, I am using the HP5 key.  I have verified with skndef that the HP5 key exists under the PR system code. Any help would be greatly appreciated. Elizabeth Ardito