LM00 ---> LM04 Screen Enhancement

Hi All,

I need to place a custom screen before calling the Transaction LM04 through LM00. I have configured the custom screen 1212 against the logical screen both for 0212 for 8x40 and 16X20 screen formats.

And I have placed the sub screen through the user exit in SAPLXLRF. So when I am logging to LM04 through LM00 my custom screen is getting called but once I want to move to the logical screen 0212 the system says no logical screen is found. So in turn my custom screen is getting displayed as the PBO is getting called.

Could any one please put some though on this. Though I know its difficult to visualize the problem but in brief which I need is to display the custom screen just before the main screen for LM04 and on PAI on my custom screen I want to show the main screen for LM04.