Hi,
i builted a webservice like the one in TaskVision MS Sample.
I make a authorizationkey for every transaction and save him
in my context.cache with the method insert() like this:

Context.Cache.Insert(authkey,User_Id,null,DateTime.Now.AddMinutes(5),Timespan.Zero);

and before any transaction i check my key like this:

Context.Cache.Get(ticket)  or Context.Cache[ticket]

This workes for the first maybe 10 Users, but later on he dosen't
saves or gets the key from the Cache.

Why?

Is this a kind of Security against polling?

Please help me

PS: I apologize for my english