Error In Avatar Plugin

I'd installed the AVATAR plugin, when I uploaded my avatar I got this error:

Warning: getimagesize() [function.getimagesize]: URL file-access is disabled in
the server configuration in
/home/.grub/u07cccc/ on line 244

[function.getimagesize]: failed to open stream: no suitable wrapper could be
found in /home/.grub/u07cccc/ on
line 244

Please help me.

I supose is a server problem that restring the access to the file, I'm using