accessing non-persistent cookies across pages

Hi,

  I am creating non-persistent cookies by not giving the expiration, so that they expire once the user closes his/her browser window. The problem is when traversing from one page to another the cookies are getting lost. They are supposed to persist for the duration. The reason I don't want to set expiration, is because if the call goes to another server on a web farm then it will cause a problem. Correct me, if I am wrong in my explanation. The article that I referred to create my non-persistent cookies is at

http://msdn2.microsoft.com/en-us/library/ms178194(vs.80).aspx

Any insight is greatly appreciated. Please respond at the earliest to pankaja_shankar@ml.com