Hey folks,
I am having quite a bit of trouble filtering out MSN Messenger on my companies network. Maybe you could help me out?

I have tried ACLs and group policies with no luck.
Details:
[code:1]Cisco Adaptive Security Appliance Software Version 7.2(1)
Device Manager Version 5.2(1)
[/code:1]
Here is the ACL that i tried:
[code:1]
access-list MSN_OUT_BLOCK extended deny tcp 192.168.55.0 255.255.255.0 any range 6891 6900
access-list MSN_OUT_BLOCK extended deny udp 192.168.55.0 255.255.255.0 any range 6891 6900
access-list MSN_OUT_BLOCK extended deny tcp 192.186.55.0 255.255.255.0 any eq 6901
access-list MSN_OUT_BLOCK extended deny udp 192.168.55.0 255.255.255.0 any eq 6901
access-list MSN_OUT_BLOCK extended permit tcp 192.168.55.0 255.255.255.0 any eq www
access-list MSN_OUT_BLOCK extended deny ip 192.168.55.0 255.255.255.0 207.46.248.0 255.255.255.0
access-list MSN_OUT_BLOCK extended deny tcp 192.168.55.0 255.255.255.0 207.46.27.0 255.255.255.0 eq 7001
access-list MSN_OUT_BLOCK extended deny udp 192.168.55.0 255.255.255.0 207.46.27.0 255.255.255.0 eq 7001
access-list MSN_OUT_BLOCK extended deny tcp 192.168.55.0 255.255.255.0 207.46.0.0 255.255.0.0 eq https
access-list MSN_OUT_BLOCK extended deny tcp 192.168.55.0 255.255.255.0 207.46.0.0 255.255.0.0 eq www
access-list MSN_OUT_BLOCK extended deny tcp 192.168.55.0 255.255.255.0 any eq 1863
access-list MSN_OUT_BLOCK extended deny udp 192.168.55.0 255.255.255.0 any eq 1863
access-list MSN_OUT_BLOCK extended permit ip any any
---
access-group MSN_OUT_BLOCK out interface outside8
[/code:1]
Here is the policy which i tried
[code:1]
class-map type regex match-any msn_exempt_list
match regex msnuser1 "booobs\@gmail.com"
match regex msnuser2 "user\@hotmail.com"
class-map type inspect im match-all MSN_BLOCK_CLASS
description "blabla"
match protocol msn-im
match login-name regex class msn_exempt_list
policy-map type inspect im MSN_BLOCK_POLICY
description "Policy blocking MSN IM"
class MSN_BLOCK_CLASS
drop-connection
service-policy MSN_BLOCK_POLICY interface outside8
---
ERROR: % policy-map MSN_BLOCK_POLICY of type (inspect im) cannot be applied to a 'service-policy' command
[/code:1]
any help which you could provide me with would be great.
Thanks,
David Prince