Hello Kregg,
Builder 5.0 uses a different object file format than Builder 4.0. Thus, Builder 5.0 is not supported by LabWindows/CVI version 5.5. For further information, I would advise that you contact one of our support engineers at the following URL:
http://www.ni.com/ask
Jeremiah Cox
Applications Engineer
National Instruments
http://www.ni.com/ask