Make sure you are logged in to the correct steam account and make sure you are also logged in to the correct c-rpg.net account.
If you are logged on steam account A and not logged in to the respective c-rpg.net account you'll encounter this problem. For instance If you are logged in to
your Steam account but logged on to
your siblings c-rpg.net account.
Note:
These people made this mod for free. They are not the dev team that made Mount & Blade. They see no profit. If you encounter this problem any further, try asking nicely without your first sentence being "I am very unhappy". Most likely it is your own fault for causing the problem.