Hello,
Well, it does not even look like your router support the feature, that's why it's not showing there sr.
http://tools.cisco.com/ITDIT/CFN/jsp/index.jsp
Check for that specific feature on the IOS Set you have,
And remember to rate all of the helpful posts
Regards,
Jcarvaja
http://laguiadelnetworking.com
Julio Carvajal
Senior Network Security and Core Specialist
CCIE #42930, 2xCCNP, JNCIP-SEC