285238 Oscommerce login/cookie issue

We have a highly customized version of oscommerce and it is working great, except that we have had a problem for a long time where the system randomly logs us out sometimes. I believe that our configurations are set to allow us to stay logged in for many hours at a time, but sometimes i get logged out after just 20 minutes. This happens mostly when trying to enter articles in our database (this is an articles module that was installed a while ago and is working fine except for being logged out occasionally). Please post in the PMB with your experience with oscommerce and with your comments on how you plan to fix this issue. If you have any questions or need any clarification, please also post in the PMB. We have a great reputation and promise to pay on time. No Escrow.