Failed to connect to [fast server]13391 Failed to initialize session with document engine: Unable to resolve Contentdistributo
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I'm trying to create a fast search connector from sharepoint 2010 to FAST Search for SharePoint.

I hit this error when trying to configure the securitytoken cert in my sharepoint.

it throw cannot validate the fast search :13391
There is no firewall between the search and i tried to do "docpush" in FAST Search. the doc can be pushed in.

I just cant get SharePoint to talk to FAST. Event Log keep throwing cannot initialise document engine [fast full name]:13391.
any idea??

(already added the service account to FASTSearchAdmin group.