The cookie problem is usually on the user's computer. For your membership to work, you have to have a cookie on your computer that Mudcat can read. If your computer's hard drive is scrambled, the cookies can be hard to read.
If you use various computers, then you have to log in (reset cookie) on each computer you use - and it's a good idea to log out if it's a computer used by others.
There is a new glitch that came with the new version of Mudcat, and it is possible that Mudcat will sometimes scramble your cookie and force you to have to reset. Happened to me once since the changeover to the new Mudcat. Jeff is working on a fix for the glitch, but it's not something that should happen very often.
-Joe Offer-