vlan setup for Ruckus/Brocade switch and Juniper SRX300

HelloI am new with brocade/Ruckus switches.But I have one stack (3 units) connection made over 10G fiber.I also have SRX 300 firewall with vlans 5,6,7.5 and 6 are for Ruckuse AP wireless networks and working just fine.Nr 7 we need for camera network. Connection should be like this:SRX300 – 2/2/2 (stack unit nr 2) tagged – 1/2/2 (tagged, dual-mode 7) – switch for camera network (no vlans etc).Port 1/2/2 (unit nr 1) is directly connected to other switch, where we have connected all the cameras and managment of the camera network. No vlans on that switch.No vlan nr 7 in stack unit nr 3.Vlans 5 and 6 come via same 2/2/2 uplink port as tagged and working just fine in all units.Dual-mode is on for VLAN 1, only port 1/2/2 is VLAN7 by default.I can ping only SRX300 10.50.2.254 from internal network (policy will allow traffic from internal network to cameras), but no ping from SRX300 or internal network to cameras network (devices).If I remove VLAN setup and add manually IP to server (internal network), then access is OK.What do I miss?Wireless network for VLANs 5/6 is working just fine as it should.