Did you update your main Gamelist with the VPX tables?
I had to add an extra VP option in PBX Settings(I forgot the exact name) and names in VPX.
Then I had to load Game List a manager once so it would create a folder in c:\pinballx\databases called VPX.
Then I took the .xml from the "Visual Pinball" database folder and pasted into VPX DB folder.
I edited it and removed all the tables for vpt and added, manaully, my 5 vpx tables.
I then loaded Game List manager and made sure they appeared. They did.
Load PinballX and the tables were there.