OK_CODE not read in SAPLMOB subscreen

Hello,

I have created a screen-exit for SAPLMOB.

My new screen is copied from SAPLMOB/2302 to SAPLXRLF/1302 , i have deleted the OK_CODE name in sub-screen.

But when i push a button in the new screen , i dont have any action and i see in debug no date into SY-UCOMM and OK_CODE.

Any idea  ?

Regards

David.