Accessing Modules page causes database error

When accessing select Home › Administer › Site building › Modules this error message pops-up 4x:

user warning: Data too long for column 'load_functions' at row 1 query: INSERT INTO menu_router (path, load_functions, to_arg_functions, access_callback, access_arguments, page_callback, page_arguments, fit, number_parts, tab_parent, tab_root, title, title_callback, title_arguments, type, block_callback, description, position, weight, file) VALUES ('gallery/%/%/%/%', 'a:4:{i:1;a:1:{s:12:\"gallery_load\";a:2:{i:0;s:4:\"%map\";i:1;s:6:\"%index\";}}i:2;a:1:{s:12:\"gallery_load\";a:2:{i:0;s:4:\"%map\";i:1;s:6:\"%index\";}}i:3;a:1:{s:12:\"gallery_load\";a:2:{i:0;s:4:\"%map\";i:1;s:6:\"%index\";}}i:4;a:1:{s:12:\"gallery_load\";a:2:{i:0;s:4:\"%map\";i:1;s:6:\"%index\";}}}', '', 'gallery_item_access', 'a:1:{i:0;i:4;}', 'gallery_menu_album', 'a:1:{i:0;i:4;}', 16, 5, '', 'gallery/%/%/%/%', '', 't', '', 4, '', '', '', 0, '') in C:\Inetpub\wwwroot\drupal\includes\menu.inc on line 2353.

There are already 3 rows with, gallery/%, gallery/%/%, gallery/%/%/% registered in the menu_router table on the mysql database and it is trying to insert a fourth one but i think the value is to long. Column setting for the value is set to 255 char.

It can see the modules but i cant change anything, what could be the problem?

Please help.