ThinShell SSO

Good Morning: I need assistance to configure HP ThinClient SSO.

"ThinShell prompts for credentional windows while connecting to VDI."

I am using ThinShell 2.5 with latest PNTOOLS on Win 7 VDI and vWorkspace 7.5 farm.

I have tried to EnableSSO on REMOTE XML and also tried Enable Kerberos with related hotfix install on CB Server.

If i use only Appportal then i can connect to VDI with SSO but when i use AppPortal Desktop integrated mode it prompt for credentails.

Please suggest how we can use ThinShell with SSO.

Thank you,

Gurpreet