Still sounds like a cookie problem to me. (you sure you don't have a cookiemonster around?)
In IE (presuming you use that) you can add a site to override your cookie setting.
Tools --> Internet option --> Privacy --> Edit --> Enter the url of the website and hit allow.
Hopefully this will do the trick.
In IE (presuming you use that) you can add a site to override your cookie setting.
Tools --> Internet option --> Privacy --> Edit --> Enter the url of the website and hit allow.
Hopefully this will do the trick.