Pages timing out

We have five in house built applications that run on the same server. However, one application seems to be timing out lately. Different pages, different hours of the day, different states (from CA, to TX, to MS, to FL), etc. Whenever one of the pages times out, the user calls and I try and duplicate by doing the exact same transaction on the same page, and it works for me without any issues. I call the sever admins located in AL and they say that the sever is fine and that the page is coded incorrected. Something call JRUN detected a problem and locked the page and when I used it, the lock was released.

This does not make sense to me. If the page/pages are coded in correctly, shouldnt they always fail ? Logically, that makes sense. But different pages fail at different times and we cannot pinpoint where teh problem is to try and fix it. One major difference between this app and the others is that this one still uses two pages, the form and action page. Some pages were rewritten to combine both into one page but that did not seem to solve the problem. We looked at the tables and they seem to be ok. We looked at the queries and ran thru analzyer and they completed quickly,no hangups. Everythihng seems to be ok, the data goes into the proper tables, etc. but some of the pages still time out. This app was running fine for the past year and half and the time outs just started happening about 2 months ago. At about the same time, the server crashed and was restored two days later. But this could just be a coincidence.

What could be causing the pages to time out ? Where else can we look to try and identify/isolate the problem ? Again, some people use it and it seems fine. But others using it wait awhile after submitting and then the page eventually times out. We are baffled and do not know what else can be done. None of the other apps seem to time out except for this one.

Any ideas or solutions will be greatly appreciated. Thanks