Sharing Issue in Cluster Disk

Hi,

I Created 2 Nodes in Win2k8 R2 SRV and Put in to a Failover Cluster ( Cluster IP : 10.0.0.250) i give the Read permission for the Available storage ( G: ) to Domain Users group. and created a Folder and i give the same Permission to that folder too.

i created a normal user ( Test User ) who is a member in a Domain Users. now i am trying to access the drive from the test user( \\10.0.0.250\G$)  , it gives  a password and Login ID screen. if i try to acces the test folder and give me the "yuu do not have permission message"

if i add the user to administrator group i can access this folder and Disc with out any login window

Kindly give suggestions to this concern...

Best regards,

Shaijith KB