Cisco Firewall :: PIX To ASA5520 Migration Some Services Aren't Working

I've recently migrated a PIX 525 to ASA 5520, but for some reason (through ASA) the users from OUTSIDE aren't able access services published in DMZ as well as some DMZ servers aren't able to communicate to some OUTSIDE services.
 
-INSIDE to DMZ is working fine. (through ASA)

-INSIDE to OUTSIDE is working fine. (through ASA)
 
Below is the configuration from my PIX (where everything works just fine) as well as the one on the ASA (where there is a problem), what could be the cause?In the below case the DMZ hosts from 11.1.10.0 aren't able to access SMTP services (through ASA) and the OUTSIDE users aren't able to access DMZ web server (11.1.10.40) through ASA, this all just works fine with PIX.
 
object-group network inside_subnet_all   network-object object inside_subnet_a   network-object object inside_subnet_b   network-object object inside_subnet_c   network-object object inside_subnet_d   network-object object inside_subnet_e   network-object object inside_subnet_f   network-object object inside_subnet_g   network-object object inside_subnet_.access-list OUTSIDE extended permit tcp any object host-11.1.10.40 object- group WWW-HTTPS access-list DMZ extended permit object SMTP object dmz_subnet any access-list INSIDE extended permit ip