yes, I thought about other alternatives to my session vars to survive the precess recycles, in this moment i'm using the sessionstate in sql server mode, I think it's must be suficient to my session vars don't be lost, but the problem is again, I 'll to check the application pool settings in IIS 6 and ISS7, thanks a lot just a question, how and where can I chek this configuration in mi windows xp and in windows server 2008??