I can't move user groups to other group
 

Hello.
Recently, I transfer users from my old forum to vBulletin. This users, automatic are in group Imported_Users and I want move all users to group Registered_Users.
I go to Users-Prube/Move users, select group Imported_Users and search for appears all users. I select all users and click en move tu new group, but a error appears:
Invalid Action...

But if I select only 5 or 10 users, I can move without any problem.
My database contains 14.000 users and I need select all, because select between 5 or 10 users....I need very hours, xDD.

Thanks and a regards.

PD: Sorry for my english