MyBB Community Forums

Hi to all...
My friend has a problem with his forum: when a user tries to insert a link (with or without the tag [url]) the link is modified, for example if I insert a link like this:

http://community.mybboard.net/newthread.php?fid=4

it's modified in :

http://www.kromas.biz/public/forum/h%3Cstrong%3E%3C/strong%3Ep://communi%3Cstrong%3E%3C/strong%3E.mybboard.ne%3Cstrong%3E%3C/strong%3Enewthread.php?fid=4

Why??
The forum's link is : http://www.kromas.biz/public/forum

Thanks to all

I solved the problem...there was an issue with the youtube's mycode...