Please tell me how we can enable logon screen changes via web repository when we work with 
RFCCurrentClient    Yes
When the logon screen comes up there is no client information, so the GuiXT changes on logon screen are not visible.

Instead of

RFCCurrentClient   Yes

you can work with

Directory1     SAPWR,client=800:xxx

(or another client where RFC user + password are configured).

Now the logon screen is also changed by GuiXT.