are you saying your users don't appear in that picker, or when you select a user and click OK, it doesn't go into the approver boxs?
Out of curiosity, what if you type in a users name directly into the Approvers box and click outside it, does that control find the user? If it does, you should see it get underlined.
Hi Vadim, when I type the users inside approvers it works fine, the issue is only when I use the dialog "Select People and Groups" where the OK button does nothing at all when clicked. Thanks for your time, Renato