Similar problem here but no luck, but with HDHomeRun.
I have a DS1511+ (intel based), TVHeadEnd from synocommunity.com, DSM 4.2.
Video Station recognizes my HDHomeRun and I can see TV Feeds, but the TV Adapters combobox in TVHeadEnd is empty.
I tried the change of permission, reboot, etc... but nothing worked so far
Ideas?