Thanks for all replies. I just noticed that the problem does occur on the PC that has MS Office 2003 as well. I uninstalled MS Office 2003 then Workbench ES works fine on Windows 7 32 bit and 64 bit which I can see the pool and its swimlane labels. Also if MS Office tools is installed prior to Workbench ES then it will cause issue of applying Workbench ES Service Pack 3. Just want to share with you all.