Web Service call hangs at Receive location everytime except first call

Hello,

we are deploying a new webservice on our production machine, it is very simple we have much more complex stuff already deployed. deployed by importing the MSI file then running installtion to create the virtual directories under IIS, the application is basically just an orchestration that receives the call, then using a referenced dll, calls an oracle procedure, this is not the first application deployed which uses oracle either. The first time it is called it gives back a reply fine, every call after that hangs ( I am looking at it in Admin console running instances) they hang and never go into suspention and there is no error, the caller just times out at his end. I see no errors in Event log and nothing to indicate were the problem is. Any ideas?

Sam