servlet has to be reloaded everyday
===

I have created  a servlet to access a database and giving response to a  BB application...it was running fine during development...but after loading it on a tomcat server 6.0 after goining live the servlet has to be reloaded every morning on the tomcat server....after that it works fine during the whole day..but the next morning when i request something it gives a blank page as response and my server admin tells the servlet has to be reloaded ...
other application hosted on the server are working fine and do not need a restart...


what might be the problem....