Check the code that you put in...  Ild remove it and double check the code before posting it again.

Please post your correct forum url  - that one is not correct.

we need the correct url to your forum so we can look at it.   If this is something SMF for Free has to fix he has GOT to have the right url.

Also try disabling JS in your browser and see if you can get in to fix it that way

To disable Javascript in Firefox: 
Tools > Options >  Content >  take checkmark out of  "enable Javascript"  in Firefox

To disable Javascript in Internet Explorer:
From the Tools menu, choose Internet Options... .
Click the Security tab.
Click Custom Level... .
Scroll to the "Scripting" section of the list. Click Disable or Enable.
Close and restart your browser.