Temp Directory: Directory not found

[gubbar]

Store ID: 39957
Website URL: julegavetilkaeresten.dk
URL to page in question:

Hi! I can't setup my directories..
It says Temp Directory: Directory not found no matter what I do.. I have created tmp-directories all over my FTP server right now but none of them will work.
It's the same with backup directories etc.
When I click the "Set up directories" I receive this message:
ERROR:mkdir() [<a href='function.mkdir'>function.mkdir</a>]: SAFE MODE Restriction in effect. The script whose uid is 846 is not allowed to access /var/www/tmp owned by uid 505() line=537
ERROR:err_dir_cannot_create(/var/www/tmp)
ERROR:err_dir_cannot_create()
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var/www/tmp is created manually.. see attached picture, but still an error.
Can you help?

Br, Christian