InfoPath Dev

I am using ADWS web services GetMyInfo and GetMembersOfGroup. They both work fine in my InfoPath 2010 form before publishing, but once they are published to SharePoint 2010, only the GetMembersofGroup pulls data. Fields that rely on GetMyInfo controls are blank. There are no errors given, but the fields that use that web service are blank. I'm guessing this has something to do with a "double hop", but I'm not sure where to go now. Any suggestions how to troubleshoot this?

I decided to use the username() function of InfoPath and then use GetUserInfo to get the same information as GetMyInfo. That seems to be the solution that works for me.