Mini Filter failing the network access to files

Hi All,
I have written a minifilter form getting the mount and unmount
notification of the volumes. In that I attch only to instances with volume
device type FILE_DEVICE_DISK_FILE_SYSTEM
and the file system type as FLT_FSTYPE_NTFS or FLT_FSTYPE_FAT. Every thing
is working fine but the problem arise when someone tries to access the shred
files from the volume from LAN. The access fails and the error specifiying
the " network name is not available anymore" is diaplayed.

I am not attching to volume other than specified above. Hence can anybody
tell me why this can be happening and what we should support to get the
network access working?

Thanks,
Giri.