Are AD1 and AD2 present in the Plug-in manager's list of instruments ?
If not then check the path you added for AD's.
During the VST scan, can you see AD1 and AD2 being scanned ? May be hard to catch depending on your PC.
My VST search path for AD's is c:\program files\common files\vst2 (the XLN installer default).
Both AD1 and AD2 dlls are in this folder.