[c-nsp] Can't configure IP SLA

[Nimal David Sirimanne]

Hi guys,

I've got a new Cisco 3550, and i'm trying to play around with the IP sla 
(IP SLAs - ICMP Echo Operation 
<javascript:openLargePopup('/ITDIT/CFN/Dispatch?act=featdesc&task=display&featureId=1894','FeatureWin',300,400)>). 
I'm pretty sure the IOS is capable of this because i went to Cisco 
feature navigator (http://tools.cisco.com/ITDIT/CFN/jsp/index.jsp) and 
it confirms the IOS image i'm using on this device model should support 
ip sla.

The IOS i'm using is Cisco IOS Software, C3550 Software 
(C3550-IPSERVICESK9-M), Version 12.2(25)SEE1, RELEASE SOFTWARE (fc1)

However, when i go to config mode, i get this:

Switch(config)#ip sla ?
% Unrecognized command

Is there something i need to enable?

Thanks!

Nimal David Sirimanne