For traffic to pass from a lower security interface to a higher security interface you need
1) an acl on the lower security interface inbound allowing the traffic
2) NAT statements for the hosts on the inside - or you can disable NAT if you want. Assuming inside hosts are on the 192.168.5.0/24 subnet and that your second interface is called DMZ2
static (inside,DMZ2) 192.168.5.0 192.168.5.0 netmask 255.255.255.0
and then in your acl allow traffic through to the relevant 192.168.5.x hosts on the inside.
Jon