Hi Tamas,
Thanks for your help, i really appreciate it.
I tried this and it worked in our system too.
Issue with my old script was that i was using "Script Recording" functionality for these ok codes and while recording it was putting an extra line for "Focus" on a subscreen which is dynamic in nature.
Nw once i removed "Focus" lines from script, its working fine 
Though if you could share the syntax on how i could find if a element exist on screen that would be great. I am sure i would need it somewhere....
Thanks again.
Regards,
Gurjeet