Memory leak in .net application

[Geek OnDemand]

Hi

I am working on a desktop application in VB.net 2005. The application contains a timer with an interval of 1 min. Each time the timer ticks, a set of functions gets executed, mostly database related.
Initially the application runs fine. In processes(Task manager) the cpu usage goes to 100% every time the timer is invoked. But the timespan is around 1 sec(negligible) .
However as the time passes and after around 20 hours the time span of timer_tick increases to something like 20-30 secs. In this period cpu usage is 100% and the application does not responds. Gradually the time span of timer_tick increases to 1 min and the cpu uses gets stuck to 100% and the application does not responds.
All objects are properly disposed.
Moreover, this issue is with pentium 4 processors. The application runs fine on core 2 duo.

Looking forward for help. Thanks in advance.

[!NoItAll]

We really need to see code to help you out here but here are a few things to look for:

1. Check scope on any objects you create within the timer and the methods called within the timer. If you are rediming a global array anywhere then it is simply growing and growing and growing.
2. As above - make sure you object.dispose
3. If you are opening db connections be sure to close AND dispose, just closing will not release the resources