HP 5500 EI :-ACL Issue

[TJtheone]

I have created 3 VLANS in HP 5500 switch

VLAN 2:- VLAN Interface:-192.168.2.254 /24

VLAN 3:- VLAN Interface:-192.168.3.254 /24

VLAN 4:- VLAN Interface:-192.168.4.254 /24

I Need to deny ACcess from 2 to 3  and from 3 to 2 It was working fine but  my 2nd requirement is to 

allow access 4 to 3 but deny from 3 to 4.   Can you please guide me how to do that or is it not possible??? because after applying acl I have noted that traffic from 4 to 3 reach but return packet is block ???

Please help 

[ISoliman]

as you said if you block one side the other will be blocked too, this cannot be achieved by ACL