That's exactly what i though from knowing IIS. BUT, it's all hosted. So, i dont have access to IIS. But, i did do a support ticket and asked them to check that and they "say" its not.
It was working after i reinstalled DotNetNuke all day long. Now, i come here tonight, and its doing it again.
It only does it when i try and login to the site. Not when i first go to the page(like when Annon Access is not checked). Its lets me go to the site with no problems, using IE or Firefox.
Regarding the MachineKey. I copied that string, from IIS on my PC as a dev site, and then i uploaded that to my host, and it didnt do anything.
I'm a bit confused on why its doing this. And the strange thing is, it's not a constant thing. Sometimes it's doing it, and sometimes it's not. That makes it really hard to troubleshoot.
Thanks