Load Report Failed

Hello,

Could someone please help me on this? I use Crystal Report bundled with VS.NET 2005 and I am getting "Load Report failed" from time to time in production. Most of times it works fine. It seems the problem appears when more people are viewing the reports. The only solution now is to restart the IIS but it becomes very difficult as it is production box. I have assigned full control on c:\windows\Temp to Network Service account, and dispose the Crystal Reports objects when page is unloaded. Any advice will be very appreciated.

Frank