Issue with CK74n session in background

Hi,

I am using tcode CK74N, Session is working perfectly in SM35 foreground mode but fails in background in ECC 6.0. The error as under:

Runtime error RAISE_EXCEPTION has occurred

The dump anlysis as under:

A RAISE statement in the program "CL_GUI_DOCKING_CONTAINER======CP" raised the

exception condition "CNTL_ERROR"

Please give me suggestion for the above problem.It is very urgent.

Thanks,

Akshatha