Logon Balancing error 88 and Error timeout occured for BW transaction Iview

Hello All,

I am trying to connect BW system from portal.

We are using SAP GUI for Window to launch the Transaction iViews and browser we are using is IE 7.0 and IE 8.0. I have selected the Technique to Start SAP GUI for Windows is "SAP Shortcut File". When calling the iView, it opens in the new window and asked downloads the file.

After download , I am getting connecting window and then following error

Logon Balancing error 88 :Connection to server is not possible(RC.9)

In detail error is

Error: timeout occured

Tue Aug 16 15:50:44 2011

Release 640

Component NI(Network interface), version 37 rc=-5,

Please suggest any approaches for the issue.

Thanks

Anand Kumar