Taken from my messageboard:
The issue is missing registry keys. For Morpheus it should be of the form:
HKEYLOCALMACHINE > SOFTWARE > Morpheus > LocalContent
with a string value nammed DatabaseDir which is something like c:\program files\morpheus\db
For Kazaa it should be of the form:
HKEYLOCALMACHINE > SOFTWARE > KaZaA > CloudLoad
with a string value named ExeDir which is something like c:\program files\kazaa\
For Grokster it should be the same as Morpheus, except clearly the string value is more like
c:\program files\grokster\db
If its complaining about the lack of a fasttrak client, make sure you have one of these keys, according to whichever one you choose to load using MX
As for my head swelling...