If you prefer IE then use it, Microsoft issued the update to fix it a couple of days ago so make sure you have that update on your computer and go back to IE. The latest version of Firefox has major changes which could be some of the problem. When I run into the login problem here at gw I clear the cache on the browser, then do the login on the actual main page of gw not one of the forums, it does seem to make a difference. To get to the main page go to the top of the KT to the top left corner where the green house is click there use the login on the page it opens to.

There's a thread here about the update with information and the link.
Check your Windows updates to make sure that you got it.

Thank you and I will go back to IE and check. I did the clear cache and GW sent me a link to try entering that way same old message, you must be signed in to reply. LOL I will get this if it is the last thing I ever do. It is the email and certain game sites discussed in here that I cannot stay logged into yet had no problem with Firefox before. I have had both on my computers as they each have their own good qualities.

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You might check the settings in Firefox to make sure it's not set to clear that stuff each time. There's something like that in the options.