Steve,
For Application Builder, you need to register the software. Onis registered, it gets associated with your copy of LabVIEW and you will get the next release when it comes out. My guess is that you did not register your 5.1 Application Builder and this was the result. Please contact your local National Instruments Sales Representative. Depending upon when you quit the software subscription program, you may be eligable for an upgrade to LabVIEW 6.1 with the Application Builder. However, only your sales person can help you with this. Click
here to find your local Sales Representative.
Randy Hoskin
Applications Engineer
National Instruments
http://www.ni.com/ask