Distributed Edition ELA - Unable to contact Managed Servers

Hi,

I've recently deployed EventLog Analyzer Distributed Edition with one Admin Server, and three Managed Servers.

- The three Managed servers are reporting as "UP" on the Admin server
- I can browse to each of the three Managed Servers from a web browser on the Admin server - eg. https://10.1.1.1:8911 admin/admin

BUT, using the same credentials as above for the Managed Server setting, I get Data Collection Status "Unable to contact remote Machine"

Anyone have any experience with this????

EDIT: I've checked obviously the simple things like accounts correct, Managed Servers are "Managed Server, Build Numbers are identical, etc.