Hi.
Well, i did the following two things, don't really know which one solved the problem, but it's solved: upgrade firmware to RC2 (was running RC1) and the following setting checked in Advanced:
Bypass firewall rules for traffic on the same interface
(This option only applies if you have defined one or more static routes. If it is enabled, traffic that enters and leaves through the same interface will not be checked by the firewall. This may be desirable in some situations where multiple subnets are connected to the same interface.)
Best wishes.