Pathauto and menu callbacks

Hi,

I was not sure where to post this but i thought someone here could help..

Ok i have a drupal website, with a few modules i wrote myself and everything is running fine. Some of those modules have MENU_CALLBACKs to make some URLs point to some functions (used for ajax and other stuff). My problem is, i decided to enable the path and pathauto modules. Still working fine, but as soon as i post some content, and therefor creating an automatic alias, every time i visit the pages where my custom modules are, the callbacks still work as supposed to, but i get a bunch of errors like these ones:

# warning: pg_query() [function.pg-query]: Query failed: ERROR: relation "url_alias" does not exist in C:\Program Files\wamp\www\drupal\includes\database.pgsql.inc on line 139.

# user warning: ERROR: relation "url_alias" does not exist query: SELECT dst FROM url_alias WHERE src = 'members/profile/dctv' AND language IN('en', '') ORDER BY language DESC in C:\Program Files\wamp\www\drupal\includes\path.inc on line 69.

if i delete the entry in the url_alias table, all the errors are gone...

any idea??

NOTE: 'members/profile/dctv' is a MENU_CALLBACK created by one of my modules.

thanks in advance