Navision 2009 R2 via Application Virtualization over WAN

Hi all,

I have tried Application Virtualization for Microsoft Dynamics Navision R2.
It worked great when i was in Local Area Network.

But when i am trying to connect NAVISION from WAN, it gives me an error A call to SSPI failed, see inner exception.

Please let me know if this can be resolved.

Saurav Dhyani