cannot browse the \\nas

Hi All,

  I have captured the Windows 7 pc and deploy through MDT. After the completion of adding to the domain. i can browse  my two qnap nas \\nas1 and \\nas2

then i restart the windows pc. since reboot i cannot browse the nas 1 or 2?

i can ping both name and ip

i can browse the NAS admin interface through IE.

Firewall is disable and remote registry enable / file and print on . 

but i cannot \\nas1 or \\nas2 or \\ip?

How do i troubleshoot this issues?

AS