Issues in creating subinterface in ASA 5520

[TGF_Cisco]

I am in a non-admin context mode in ASA 5520  8.0 (5) and i m trying to add a new interface

GigabitEthernet1/2.4 172.19.4.1 255.255.254.0 manual
GigabitEthernet1/2.6 172.19.6.1 255.255.255.0 CONFIG
GigabitEthernet1/2.180 172.19.180.1 255.255.252.0 manual
GigabitEthernet1/2.190 172.19.190.1 255.255.254.0 manual
gvadc-fw/tgf# conf t
gvadc-fw/tgf(config)# int g
gvadc-fw/tgf(config)# int gigabitEthernet 1/2?

configure mode commands/options:
1/2.180 1/2.190 1/2.4 1/2.6
gvadc-fw/tgf(config)# int gigabitEthernet 1/2.168 ?
ERROR: % Unrecognized command
gvadc-fw/tgf(config)#

what do i do?

[Rudy Sanjoko]

i just replied to your other post, give it a try

on a context, you can only assign or allocate interfaces that are  defined on what they called with system execution space. you can go to  system exec. space from context by using changeto system command, once you are in system, you can define/create subinterface and  enable it, then back to context to allocate that interface.

[Rudy Sanjoko · Accepted solution]

I guess you have managed to make it work, please mark this post as answered so that people know that the problem has been solved.