Question : Problem: Surf Control will not work

Ever since we installed 2 new 48 port Cisco Catalyst 3750 switches we cannot get Surf Control to work properly, I think it may be the span port setup in the switch,  it does not block anything, here is what it looks like in our switch:

*We have port 47 as the Destination Port, and port 48 is our source port which is uplinked to our firewall.

interface GigabitEthernet2/0/47
 switchport trunk encapsulation dot1q
!
interface GigabitEthernet2/0/48
 description Uplink to ASA5510
 no switchport
 ip address 172.16.0.6 255.255.255.252
 speed 100
 spanning-tree portfast

*Then we have the monitor session commands designating which port is source and destination.

monitor session 1 source interface Gi2/0/48
monitor session 1 destination interface Gi2/0/47
end

I can't find any other person that has theirs setup differently, is there anything else that should be entered into the switch to make it work? or is there something I should  double check on the Surf Control server itself (which is Server 2003 R2 SP2)?

Thanks ahead of time guys!!

Answer : Problem: Surf Control will not work

The configuration is fine. You can't however use the SPAN destination port to transmit any data, so I assume that you have another interface on the server connected to a normal access port as well.