problem with install virtfile.inf on 2008r2 media server

Hi all,

I had a problem about installing virtfile on a media aserver with 2008R2 OS.

I had successful install the virtfile.inf and can find the virtfile.sys at system32\Driver folder.

But while I check with fltmc command it sill do show virtfile on the list.

I had follow the solutions mention on below post (all the solutions had tried):

http://www.symantec.com/docs/TECH49376

Thanks,

Kenny