Users cannot vote on polls.

[MagicPID]

When my users try to vote on a poll they get this

you do not have permission to access this page. This could be due to one of several reasons:

Your user account may not have sufficient privileges to access this page. Are you trying to edit someone else's post, access administrative features or some other privileged system?
If you are trying to post, the administrator may have disabled your account, or it may be awaiting activation.

I've looked through all the usergroup settings but cannot find anything related.

Any suggestions?

Thanks