After Upgrade error?

[Miley]

I just upgraded to the newer version of MyBB and now I get this error:

Fatal error: Call to undefined function iif() in /home/a4161465/public_html/forum/global.php(438) : eval()'d code on line 8


The file is there....

[Matt]

Try reverting your header template to default, something isn't right with it, make a note of anything you may have added to it first though.

[Miley]

That worked but my changes to the header I made, which looked REALLY nice dont work properly ;[

[Matt]

Do you have the noted down copy of what was there previously??

[Miley]

Yeah, I just fnished fixing it. Just lke 2 simple file edits xD