PECT Agent Missing from Automation DS 7.5

When I attempt to boot a computer into automation (WinPEx64) via PXE, it gets stuck at this screen:

This is probably because it doesn't contain the PECT agent files, or any of the files that should be listed in the screenshot below.  The Symantec folder is missing, as well as the Altiris folder.

If I boot to autmation using a boot disk or automation folder, the files are there.