Hi Mrinal,
Two things to make things better (you can do either, it's not necessary to do both):
1) Switch the example from Snowdrop 1.1 to 2.0.0-MP1-SP1. Only the latter works on AS6.
2) You don't really need Snowdrop for VFS scanning on AS6 if you are using Spring 3.0.3 or later.
Try either of them and it'll work.
Marius