call transaction

I encounter problem when passing values from program A to program B. In program B, there is a field with a parameter ID tied to it. I have written something like this:

SET PARAMETER ID <PID> <VALUES FROM PROGRAM A>.

CALL TRANSACTION <PROGRAM B'S TCODE>.

When I execute, there is no values being passed into program B. I have tested the above codes by calling standard transaction codes and was able to get values on the standard tcode screen. Would anyone know why when I pass to a customized program, it did not have the value in it? Is there any extra steps that needs to be done?

Please advice.Thanks