IPSec and group policy

[inbflat]

I'm trying to implement an IP sec filter through group policy. I'm trying to block port 443 for a specific group. I have the filter assigned in a group policy object under Computer Configuration>Windows Settings>IP Security Policies on Active Directory.

My filter list looks like this:
Mirrored | Description |Protocal | Source Port|
Yes block 443 TCP Any
Yes block UDP 443 UDP Any


Destination Port| Source DNS Name | Source Address |
443 <any ip adddress> <any ip adddress>
443 <any ip adddress> <any ip adddress>

Source Mask | Destination DNS | Destination Address |
0.0.0.0 <my ip adddress> <my ip adddress>
0.0.0.0 <my ip adddress> <my ip adddress>

Destination mask |
255.255.255.255
255.255.255.255

can anyone tell me what I've done wrong?

thanks!