BE2014_14.1 - Unable to Create Disk Storage

Hi All ... I'm getting BE2014 setup and we're trying to configre disk based Storage that points to a share on our ISILON NAS to store the our monthly / yearly backups and every time I try to create the Disk I get a "Unable to create the disk storage" error. The Sub error is "The paramater is incorrect"

I tested using the FQN, Share name, IP .. nothing works. 

I made a test share on a windows server VM and it adds no problem. 

Any ideas why BE isn't playing nice with our ISILON?

I've tried shortening the name, shorting the path .. no change. I have verified that the BESA has access to the share as well.

Thanks!

Chris