Corrupt Administrator Group

[wildpureheart]

Hi there. I'm new here, and this is a first post. I hope I have placed it appropriately.

It would appear that my fairly new vBulletin install has had some sort of corruption to the Administrator group type. When I log in as Admin, I get the "thanks for logging in" message, and then I get dropped back out to the login screen.

If I log in with a second account I set up that also has Administrator privileges, I am able to log in, but I do not get the full Admin control panel, just a smaller subset of options.

I have verified that the second account does, indeed, have the same usergroupid as the Administrator group by running a couple of SQL queries using phpMyAdmin. I can supply screen shots to this effect, if that would be helpful.

Any help would be greatly appreciated, as it would, indeed, be useful to actually access the Administrator role.

Thanks in advance.

Cheers,
Andrew