Cain, Abel & I

I need some advise,
When attempting to find and enumerate workgroups in Cain and Abels Inumerator, the only workgroup that displays is my own machine.

I'm going by datastrongholds tutorial on accessing WEP protected networks with Cain and Abel. (Link: [url]www.datastronghold.com/security-articles/general-security-articles/cain-and-abel-tutorial.html[/url] )
Which describes the enumeration of any victims comps as a key step to accessing them.

I believe the sniffer has been properly configured (using the appropriate device) and I've installed the latest winpcap as well.

Help would be greatly appreciated!
Cheers