Time out issue in CRM WEB UI

Hi,

We have an issue in CRM WEB UI,

In service contract header page for particular contarct type we are getting a "Time out message" for less than 7 minutes as

"Your session has timed out. Click here to start a new session. "

We tried with the follwing steps,

1.If we remove the user parameter "WCF_IGNORE_ENHANCEMT = A" (this profile

parameter refers to plain vanilla version of SAP webui ) on our user profile

(which I did now for ossuserrd), then timeout will not happen for 20, 25

minutes.

Could any one guide us to solve the above issue..

Regards,

S.Balaji