Has anyone had any success using any of the WebUtil Methods?

I'm trying to save and get response data, but always get an empty string. At this point, I just want to know if the darn thing even works before I spend anymore time with it. To test it, I'm using the following code:

WebUtil.SaveResponseData "*","HTTP","","",2
Browser("Client Summary").Page("Requesting Report...").Image("b-pre-rpt").Click
MsgBox(WebUtil.GetSavedResponseData ("HTTP"))

Which looks exactly like the example in the help file, but doesn't work.