HUD error and package error

here is the error i recieve everytime i click on the packages button in the admin control panel
error: the xml response that was returned from the server is invalid.

Fatal error: Maximum execution time of 30 seconds wexceeded in
/var/www/html/maint/includes/classes/xpath.class.php on line 3520

you have whitespace in you response

and does any one know how i can recomplie huh[/img]