Cant upload avatars. getting errors

Every time a user wants to upload an avatar they get either one of these messages:

i) Invalid URL
ii) Unable to move/copy file

This happened after the install of VBSEO. It used to work fine. How can I fix it?

Thanks

Does it work correct when you temporary disable vBSEO

Ok. So I got my avatars working, but only the upload from your computer one. I checked my error_log file and these are the last few lines that came up:

Code:

[25-Jun-2009 02:38:23] PHP Warning:  include() [<a href='function.include'>function.include</a>]: Failed opening '/404.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /vbseo.php on line 1570
[25-Jul-2009 18:57:06] PHP Fatal error:  require_once() [<a href='function.require'>function.require</a>]: Failed opening required '/functions_post_thanks.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /class_postbit.php(265) : eval()'d code on line 1
[25-Jul-2009 18:57:08] PHP Fatal error:  require_once() [<a href='function.require'>function.require</a>]: Failed opening required '/functions_post_thanks.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /class_postbit.php(265) : eval()'d code on line 1
[25-Jul-2009 18:57:21] PHP Fatal error:  require_once() [<a href='function.require'>function.require</a>]: Failed opening required '/functions_post_thanks.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /class_postbit.php(265) : eval()'d code on line 1
[25-Jul-2009 18:57:21] PHP Fatal error:  require_once() [<a href='function.require'>function.require</a>]: Failed opening required '/functions_post_thanks.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /class_postbit.php(265) : eval()'d code on line 1
[25-Jul-2009 19:21:29] PHP Warning:  require_once() [<a href='function.require-once'>function.require-once</a>]: Unable to access /hclass_core.php in /init.php on line 45
[25-Jul-2009 19:21:29] PHP Warning:  require_once(/class_core.php) [<a href='function.require-once'>function.require-once</a>]: failed to open stream: No such file or directory in /init.php on line 45
[25-Jul-2009 19:21:29] PHP Fatal error:  require_once() [<a href='function.require'>function.require</a>]: Failed opening required '/class_core.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /init.php on line 45
[25-Jul-2009 19:28:50] PHP Warning:  include_once() [<a href='function.include-once'>function.include-once</a>]: Unable to access /config.php in /vbseo.php on line 17
[25-Jul-2009 19:28:50] PHP Warning:  include_once(/config.php) [<a href='function.include-once'>function.include-once</a>]: failed to open stream: No such file or directory in /vbseo.php on line 17
[25-Jul-2009 19:28:50] PHP Warning:  include_once() [<a href='function.include'>function.include</a>]: Failed opening '/config.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /vbseo.php on line 17
[25-Jul-2009 19:28:50] PHP Warning:  include_once() [<a href='function.include-once'>function.include-once</a>]: Unable to access /config.php in /vbseo.php on line 17
[25-Jul-2009 19:28:50] PHP Warning:  include_once(/config.php) [<a href='function.include-once'>function.include-once</a>]: failed to open stream: No such file or directory in /vbseo.php on line 17
[25-Jul-2009 19:28:50] PHP Warning:  include_once() [<a href='function.include'>function.include</a>]: Failed opening '/config.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /vbseo.php on line 17
[25-Jul-2009 19:28:50] PHP Warning:  include_once() [<a href='function.include-once'>function.include-once</a>]: Unable to access /config.php in /vbseo.php on line 17
[25-Jul-2009 19:28:50] PHP Warning:  include_once() [<a href='function.include-once'>function.include-once</a>]: Unable to access /config.php in /vbseo.php on line 17
[25-Jul-2009 19:28:50] PHP Warning:  include_once(/config.php) [<a href='function.include-once'>function.include-once</a>]: failed to open stream: No such file or directory in /vbseo.php on line 17
[25-Jul-2009 19:28:50] PHP Warning:  include_once(/config.php) [<a href='function.include-once'>function.include-once</a>]: failed to open stream: No such file or directory in /vbseo.php on line 17
[25-Jul-2009 19:28:50] PHP Warning:  include_once() [<a href='function.include'>function.include</a>]: Failed opening '/config.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /vbseo.php on line 17
[25-Jul-2009 19:28:50] PHP Warning:  include_once() [<a href='function.include'>function.include</a>]: Failed opening '/config.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /vbseo.php on line 17
[25-Jul-2009 19:28:50] PHP Warning:  include_once() [<a href='function.include-once'>function.include-once</a>]: Unable to access /config.php in /vbseo.php on line 17
[25-Jul-2009 19:28:50] PHP Warning:  include_once(/config.php) [<a href='function.include-once'>function.include-once</a>]: failed to open stream: No such file or directory in /vbseo.php on line 17
[25-Jul-2009 19:28:50] PHP Warning:  include_once() [<a href='function.include'>function.include</a>]: Failed opening '/config.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /vbseo.php on line 17

What do they mean?

Are you using a custom config.php file ?