[support] User roles not saving

Hi,

I have a weird issue in Drupal 4.7.3. My user roles aren't saving when I assign roles to them.

I have, for example, user Erich, and he must get role Webmaster. I edit his account, and assign the role, but the information is not saved.

I have checked the database - as far as I can tell everything is working fine. The Users table has the account Erich (obviously) and the Roles table has the role Webmaster (also obvious). But users_roles table remains empty when saving the user's account.

I checked the sequences table, and saw that there is no role_rid entry there - not sure if that could be the cause of the problem? Should I add it? node_nid and user_uid is there, so I assume it should be safe to add? Will it help?

Anyone any other ideas where I can continue my search for this problem?

Thanks in advance!

Kobus