Avast Business Managment (on-premise) not updating

hi
i installed Avast management console in a server which has “small avast administration” SOA console
the installation of avast management went well without any issue , only the issue is to connect to internet by activating , downloading and updating ,
this server getting the internet from ISA server
the internet is working good in this server, browsing downloading , SOA getting the updates with no issue
only thru management business doesn’t want to activate or update, when i update or try to activate there is no connectivity showing on ISA server , it seems cant connect to ISA,
when i connect the server directly to internet , it gets the activation and updates
i tried to do many thing with no luck
i uninstall the SOA with endpoint protection , no luck
i looked at firewall at the server , i made most of the options open , no luck

please any advise will be helpful

another question please , is there any proxy setting option for Avast Business Console ??
on the proviso “small office administration” therer was an option to fill in , but in avast business i dont find it