InfoPath Dev

Thanks for the tips, Pat. However, what I am trying to do is a bit different. I have a field where I can choose a userid from our AD database. What I need is to be able to enter more than one entry in this field. The field is set for multiple entries in SP Designer but when I try to enter more than one user in the SP site itself, I get the error ...

I've created an InfoPath 2010 form  and one of my fields is set as a PERSON/GROUP PICKER. RIGHT-CLICK on the PEOPLE PICKER box and select PROPERTIES. Then on the GENERAL tab,  check the box next to ALLOW MULTIPLE SELECTIONS. Click OK and publish form to site. Then when I go to the SP site and try to add a new item to my list, I try ...