I try to do a thumbnail of the pictures of my web with GD library and i obtain this

Warning: imagejpeg() [function.imagejpeg]: SAFE MODE Restriction in effect. The script whose uid is 82595 is not allowed to access /www/uuuq.com/s/w/e/sweetmonsters/htdocs/img/fashion/accesorios/Bisuteria/thumbs owned by uid 2001 in /www/uuuq.com/s/w/e/sweetmonsters/htdocs/admin/funciones.php on line 147

Warning: imagejpeg() [function.imagejpeg]: Invalid filename in /www/uuuq.com/s/w/e/sweetmonsters/htdocs/admin/funciones.php on line 147

Whats happen? is not allowed??

EDIT: fopen, fwrite, etc is not allowed now?

Warning: fopen(./logs/Log_14-06-2009.txt) [function.fopen]: failed to open stream: Permission denied in /www/uuuq.com/s/w/e/sweetmonsters/htdocs/online.php on line 28