On a different set of machines…I”m stumped. I mean, I though I”d nailed it with the proxy problem, but unfortunately there are still some machines where the 1st call is really really slow and removing the proxy isn”t helping. I”ve even profiled the code but I still can”t see where the problem lies. I”ve written a post on the WCF forum, but there are still no clues on how to solve this. Anyone wants to give it a try?