Crystal Reports does not passes the input parameter to SAP ABAP Fun (BAPI)

Hello,

We have created SAP ABAP Function (BAPI) in SAP and using Crystal Reports on top of it. Now we see all the database fields with a Prefix "I_" (Input Parameter field) and "T_" (Table Fields) and we put in input parameter in "I_" field but it wont pass any value to BAPI function which result in no output on the Crystal Report.

Is there anything am i missing in here?

Please advice.

Thanks.