Finally I found the issue...

its Connection.Open();

when i request from Windows 7 client machine...

Connection.Open() Take lot of time to respond....;

no need to find what connection string should i try which will...

it seems windows 7 and windows server 2008 R2 got some trouble....

i tried a lot but couldn't figure out what is happening...

windows server 2008 R2 and XP are working very...

I tried with a dummy .net application without sql connection....just few forms.

and i placed them on server 2008. and executed from windows 7 client machine.....

this worked very fast and smooth...

then...

thank you for your response.

i tried with the steps you gave.

both Protocol are identical for XP and windows 7. i run a trace through profiler.

it seems like the...