Port mirroring not working

Hey all!

Just got my RB2011U and Im loving it. Only issue Im having is with port mirroring. What I want to do is to mirror all traffic coming in and out of the WAN interface (ether1) to ether5. What Ive done is go into Switch → Switch 1 and set Mirror source to ether1 and mirror target to ether5. However, this doesnt seem to have done much…

 #    NAME        MTU MAC-ADDRESS       ARP        MASTER-PORT      SWITCH     
 0 R  ether1...  1500 D4:CA:6D:EC:13:8D enabled    none             switch1    
 1 RS ether2     1500 D4:CA:6D:EC:13:8E enabled    none             switch1    
 2 RS ether3     1500 D4:CA:6D:EC:13:8F enabled    none             switch1    
 3 RS ether4     1500 D4:CA:6D:EC:13:90 enabled    none             switch1    
 4 R  ether5     1500 D4:CA:6D:EC:13:91 enabled    none             switch1

Ether1,2,3,4,5 are all in a bridge together.

Any ideas?

Thanks so much!

As I understand it, the ports can not be in the same bridge group like that. Here is the Wiki page on the switch chip features:
http://wiki.mikrotik.com/wiki/Manual:Switch_Chip_Features

Still havent gotten it to work. In the switch config for switch 1 Ive set ether5 as mirror target and ether1-gateway as mirror source. That doesnt seem to do much. Then Ive also set a switch rule that says all traffic going to ether1-ether4 should mirror.

How should ether5 be configured? In the same bridge as ether2-4 or not? Should it have a master port or not, etc?

Thanks so much for your help.