can you ping the firewall from the 146 and 148 networks? If you cannot ping the firewall from the 146 network, it is likely because you need a route in the firewall to get to the 146 network.  In DOS this would look like this: route add 192.168.146.0 mask 255.255.255.0 192.168.148.201 Of course your firewall will have different syntax, but you get the idea.  
Looking for a little help with VLAN's on Power Connect 6248 stack.  Have 3 VLAN's, Management, Printing and LAN Have routing enabled globally and have routing enabled on Printing and LAN.  I can ping the both VLAN interfaces from either VLAN.  I can get outbound access when on the 148 / LAN VLAN. I can't communicate across the VLAN's though.  Config below.  Any help would be appreciated. !Current Configuration: !System Description "  6248, 3.2.0.7, VxWorks 6.5"!System Software Version 3.2.0.7!Cut-through mode is configured as disabled!configurevlan databasevlan 10,146,148vlan routing 148 1vlan routing 146 2exitstackmember 1 2member 2 2member 3 2exitip address 10.10.10.10 255.0.0.0ip address vlan 10ip routingip route 0.0.0.0 0.0.0.0 192.168.148.200interface vlan 10                      name "Management"exitinterface vlan 146name "Printing"routingip address 192.168.146.201 255.255.255.0exitinterface vlan 148name "LAN"routingip address 192.168.148.201 255.255.255.0exitusername "symantec" password e051947544fed380d83a0998ab40719b level 15 encrypted!interface ethernet 1/g1switchport access vlan 148exit!interface ethernet 1/g2switchport access vlan 148exit                      !interface ethernet 1/g3switchport access vlan 148exit!interface ethernet 1/g4switchport access vlan 148exit!interface ethernet 1/g5switchport access vlan 148exit!interface ethernet 1/g6switchport access vlan 148exit!interface ethernet 1/g7switchport access vlan 148exit!                      interface ethernet 1/g8switchport access vlan 148exit!interface ethernet 1/g9switchport access vlan 148exit!interface ethernet 1/g10switchport access vlan 148exit!interface ethernet 1/g11switchport access vlan 148exit!interface ethernet 1/g12switchport access vlan 148exit!interface ethernet 1/g13                      switchport access vlan 148exit!interface ethernet 1/g14switchport access vlan 148exit!interface ethernet 1/g15switchport access vlan 148exit!interface ethernet 1/g16switchport access vlan 148exit!interface ethernet 1/g17switchport access vlan 148exit!interface ethernet 1/g18switchport access vlan 148                      exit!interface ethernet 1/g19switchport access vlan 148exit!interface ethernet 1/g20switchport access vlan 148exit!interface ethernet 1/g21switchport access vlan 148exit!interface ethernet 1/g22switchport access vlan 148exit!interface ethernet 1/g23switchport access vlan 148exit                      !interface ethernet 1/g24switchport access vlan 148exit!interface ethernet 1/g25switchport access vlan 148exit!interface ethernet 1/g26switchport access vlan 148exit!interface ethernet 1/g27switchport access vlan 148exit!interface ethernet 1/g28switchport access vlan 148exit!                      interface ethernet 1/g29switchport access vlan 148exit!interface ethernet 1/g30switchport access vlan 148exit!interface ethernet 1/g31switchport access vlan 148exit!interface ethernet 1/g32switchport access vlan 148exit!interface ethernet 1/g33switchport access vlan 148exit!interface ethernet 1/g34                      switchport access vlan 148exit!interface ethernet 1/g35switchport access vlan 148exit!interface ethernet 1/g36switchport access vlan 148exit!interface ethernet 1/g37switchport access vlan 148exit!interface ethernet 1/g38switchport access vlan 148exit!interface ethernet 1/g39switchport access vlan 148                      exit!interface ethernet 1/g40switchport access vlan 148exit!interface ethernet 1/g41switchport access vlan 148exit!interface ethernet 1/g42switchport access vlan 148exit!interface ethernet 1/g43switchport access vlan 148exit!interface ethernet 1/g44switchport access vlan 148exit                      !interface ethernet 1/g45switchport access vlan 148exit!interface ethernet 1/g46switchport access vlan 148exit!interface ethernet 1/g47switchport access vlan 148exit!interface ethernet 1/g48switchport access vlan 148exit!interface ethernet 1/xg3switchport access vlan 148exit!                      interface ethernet 1/xg4switchport access vlan 148exit!interface ethernet 2/g1switchport access vlan 148exit!interface ethernet 2/g2switchport access vlan 148exit!interface ethernet 2/g3switchport access vlan 148exit!interface ethernet 2/g4switchport access vlan 148exit!interface ethernet 2/g5                      switchport access vlan 148exit!interface ethernet 2/g6switchport access vlan 148exit!interface ethernet 2/g7switchport access vlan 148exit!interface ethernet 2/g8switchport access vlan 148exit!interface ethernet 2/g9switchport access vlan 148exit!interface ethernet 2/g10switchport access vlan 148 --More-- or (q)uit 
VLAN connectivity 6248's