Zoho Assist is not working

Zoho Assist is not working

All remote PCs are being prompted for Proxy setup.   We can't access any remote PCs.  Even customers selected "Dont show this again", we can't remotely login. 

please help

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      • Release Notes: Version 1.91, February 2015

        Unattended Access (Beta) is live!   Unattended Access, a feature requested by a lot of our customers is live now. Currently, it's in beta. You can add up to 100 computers per Technician subscription. They can also be accessed by your organization members.  My Computers  list in Zoho Assist home page will  always  display the online status of your unattended computers. You can rename the computers whenever you wish.  Currently, Unattended Access can be configured only for Windows computers. Nevertheless,