External Image not embedded with RDLC.

Hi,
In my project,  I am using RDLC External Image source to embedded the Image to export. 

All images are stored in NAS Space. When i retrieve the dataset with NAS storage Location and passing to RDLC. But in .RDLC Image is not coming.

I am using file///<NAS Location/Filename.JPG>

I tried many ways nothing working out. anything idea. any help.

Regards,
Ponraj