403 Error SMF v.1.1.1

[Actual_Size]

SMF Version: SMF 1.1.1
I keep getting a 403 error after logging in as admin. Initially I can browse everything on the boards, access the admin panel and initiate changes, see the calendar, memberlist, etc. However, once I try to reply to a post the 403 error pops up and following that the same occurs when I try to access the admin panel again, the calendar, member list, logout, etc.

Tried the .htaccess fix, the modifications to the QueryString.php file and repair_setting.php. No joy.

Everything was running fine until yesterday and no new mods have been added. Any suggestions?

[Oldiesmann]

Can you post a link to your boards and give us a test account?

I would suggest talking to your host about the issue.

[Actual_Size]

Sure...

hxxp:mini-mama.org/forum/index.php [nonactive]

Username: test

The password has been e-mailed to you.

Thanks...Appreciate the help.

(except...of course...everything started working fine again just after I initially posted this. )

[Oldiesmann]

Yeah, everything does seem to be working fine now. It could have just been a temporary server problem. If it continues to happen, let me know and I'll look more into it.