My Avatar Does Not Appear In SideBar; Rebuild Custom Avatar Thumbnails

[m55629]

when I rebuild Custom Avatar Thumbnails this error appear:

Warning: tempnam() [function.tempnam]: open_basedir restriction in effect. File() is not within the allowed path(s): (/home/emperor:/usr/lib/php:/usr/php4/lib/php:/usr/local/lib/php:/usr/local/php4/lib/php:/tmp) in [path]/includes/class_dm_userpic.php on line 204

Warning: fopen() [function.fopen]: Filename cannot be empty in [path]/includes/class_image.php on line 333

how i solve this?

--------------- Added [DATE]1348312874[/DATE] at [TIME]1348312874[/TIME] ---------------

Avatar Thumbnails does not show in forum side bar

after I go to solve it I see above error in Building thumbnails

--------------- Added [DATE]1348319737[/DATE] at [TIME]1348319737[/TIME] ---------------

my problem was solved
this is what I must do:
https://www.vbulletin.com/forum/show...ctivity-Stream
thanks.