the site wont let me log in .......

i have to enter my usename and pass to make each post ... but it wont log me in

Try this (bottom of page)

I had exactly the same problem recently, not sure if it was coincidental but I'm sure this happened after a windows security update, this was also fixed after another security update, as the cookie thing wasn't fixinf the problem. So if you're using XP you could have a check for latest updates.