Avatar problem...

Mist helped me with some code that I entered into the phpinclude. It makes the users avatar be allowed to show in the header template..

PHP Code:

// User Avatar 
if ($bbuserinfo[userid]!=0) { 
  $avatarurl=getavatarurl($bbuserinfo[userid]); 
  if ($avatarurl=='') { 
    $avatarurl='images/avatars/noavatar.gif'; 
  }   
$avatarimage='<a href="member.php?s='.$session[sessionhash].'&action=editavatar"><img src="'.$avatarurl.'" border="0" hspace="1" vspace="1">'; 
} else { 
  $avatarimage='<a href="register.php?s='.$session[sessionhash].'&action=signup"><img src="images/avatars/guestavatar.gif" border="0" hspace="1" vspace="1"></a>'; 
} 


Now the avatar shows up in the header template, but when I try to upload a custom avatar I get this message.

Error - cannot find an image at the specified URL. Please make sure that you have entered a valid URL

.

Now if I switch forum skins I'm able to upload an avatar. I haven't edited any .php files, just the phpinclude and the header templates.

Any reason as to why this happens?

Thanks