InfoPath Dev

I'd like to know if anyone is having issues getting group information when InfoPath 2010 connects to the UserGroup web service in SharePoint 2010. What I'm trying to do is figure out if the current user is a member of a certain group in a SharePoint subsite. I've followed the many excellent blog posts including the following ...

I have an InfoPath template with managed code written in InfoPath 2007, but targeted to InfoPath 2003 (we have a mixed environment here and it will unfortunately stay a mixed 2003/2007 environment for the forseeable future)  In the form I have a button that allows the user to click on it, and it will submit the form, then open a new form ...

Thanks that did it for me! 

Does anyone know if it is possible to change the error message InfoPath gives when someone tries to submit a form without the required fields filled out?  I have validation on a few fields in a form, but stilll have users trying to submit anyway-  Is there anyway to change the message shown in the link below to give them a cleaner error ...