Session Expires too early! Help!

[vikas rao]

Hi,
I am working on a bug in my application, the problem is, the session expires
every 2 minutes or so and I have to log back in to continue, this is very
frustrating. How do I go about debugging this? Which areas of the code do
you guys think would be best to check for errors?
Any inputs would be very appreciated.
Thanks.
Vikas.