Please post all asp.net related questions here: http://forums.asp.net/
Also, when you repost, please include much
more detail (I can't stress that enough). If I were to change this question to something about cars it would be similar to saying 'my one car runs slow but my other car runs fast. they both have plenty of gas in the tank. why is that?'. We would
be grasping at straws.
Maybe better for you to start out doing a Google or Bing search on how to profile performance for an asp.net application.
Good luck.
Mark as answer or vote as helpful if you find it useful | Igor