Cannot find page suddenly

[leesu000]

Hi there,
Sometimes, some users cannot connect intranet service based on ASP.net suddenly. The other users have no problem at that time. After around 20min, the connection is recoveried automatically. Rebooting is faster way to recovery connection. I've never seen this situation on my debugging environment.
More serious problem is that a page is halted on working but idle time.
On this error, a user has to terminate the process of browser.

What's the first step to find the right way? Needs your experieces.
Thanks

[sashi]

What language are you working on, i.e. vb.net, C#? Which one?

Check for infinite loops in your code :)

[leesu000]

I'm using the mixed langunages includes VB.net and C#.
Thanks