fltmc attach datascrn c: , error 0x801f0013 when I wanted to solve the 'cfrmd' warning.

when i want to solve this problem below

http://social.technet.microsoft.com/Forums/windowsserver/en-US/dc557f3b-34d7-438a-bba2-9899d6bef977/eventviewer-showing-lots-of-filtermanager-warnigns-event-id-4?forum=winserverhyperv

by the method of 

"http://technet.microsoft.com/en-us/library/cc734238(v=ws.10).aspx"

I tried "fltmc attach datascrn c:"

it came"连接失败，出现错误 0x801f0013" which means 'failed to connect, error 0x801f0013'

then I tried To verify that the file screening minifilter driver is working properly as it said,

there was no 
Datascrn
 instance listed for the volume

so how can i solve the problem above.

many thanks.