PXE Imaging From Network

After upgrading from Zenworks 6.5 SP2 to 7SP1 with HP3 and 4 installed I
tried to image a pc to the network and receive the message (after a dhcp
address) The Zenworks Pxe Server may be outdated as it does not appear to
support a required function. All the installs completed successfully.
Anyone have an idea why this is happening?