Problem with uploading avatar-prof. picture

[Mualo]

hi i am trying to upload an avatar or a profile picture and vbulletin shows me "Upload of file failed." I must add any product???plz explain as much as you can....

P.S. Permissions are all on and the filesize (pixels etc) are checked!!!!

[Dismounted]

Test uploading a file in the Admin CP.

Admin CP > Maintenance > Diagnostics

[Mualo]

I done it and the result "The attached file's temporary location (C:\\php5\\uploadtemp\\phpB98.tmp) could not be found. The test cannot continue."

[Dismounted]

It seems like a server-caused error. I would suggest contacting your host.

[Mualo]

how can i fix that?sorry but i know few things!!!

--------------- Added 1215847209 at 1215847209 ---------------

i have the hosting.....can you help me about that?

[Dismounted]

If you know "a few things", you would've seen the error ;).