Create snapshot database error on remote server

Environment:

OS: Windows 2008 R2
SQL Server : 2008 R2 EE
Shared NAS storage: NTFS (\\RemoteServerName\SharedFolderName)
Permisisons on Shared folder: Full control
Source DB model: Full recovery.

Snapshot DB Script:

CREATE DATABASE TestDB_Snapshot1 ON ( NAME = TestDB_data, FILENAME ='\\RemoteServerName\SharedFolderName\TestDB_Snapshot1.ss')
AS SNAPSHOT OF TestDB
GO

Error:
Msg 1823, Level 16, State 2, Line 1
A database snapshot cannot be created because it failed to start.
Msg 5119, Level 16, State 2, Line 1
Cannot make the file "\\RemoteServerName\SharedFilderName\TestDB_Snapshot1.ss" a sparse file.
Make sure the file system supports sparse files.

Questions

1. Can't create snapshot database on remote server location if NTFS filesystem? Seen in below MS KL limitations, FAT32 not support snapshot databases. But our storage is NTFS filesystem(NAS storage).http://msdn.microsoft.com/en-us/library/ms175158.aspx#Prerequisites
   
2. Any suggestion to create snapshot on NAS storage area wihtout any sparse files errors?
   Note: Able to create snapshot database if it is local disk on the server and
   not able to create if it remote server shared location

Thanks in advance.