How to map drop downlist data to RFC data in adobe form

Dear Experts

I am developing an adobe interactive form by web services method first i created a function module then i made it remote enabled after that i create a web service using this.

In form i made a data connection using URL generated by SOAMANAGER by clicking on button Open WSDL document for selected binding.

After that i dragged all the fields in the form here i changed an object in to drop down list lets say i change designation field to drop down list where i statically field the list with value from fields palette values say manager , jr manager, dy . manager.

when i press the submit button data is not updated in the designation field but all other data fields are saved in table. please

help me in this scenario.