Oh, I just read your comments on your LearnCentral wall and see that the concept mapping event was intended for the bog LearnCentral room. I think you may have forgotten to change the location from your vRoom (that is the default) to the main meeting room. You will need to copy paste the LearnCentral guest link in that spot. :0)
We are a big user of Cmap in our family and have built quite a library of concept maps as a family as a natural part of our educational activities. I was even using concept mapping using stick it notes before software became available. Yay for software! If you are curious about what our family has built as a long term, collaborative project, go to our family cmap root map at http://cmapspublic2.ihmc.us/rid=1161009382437_885763749_8663/armoorefam%20Home%20Cmap.cmap
If you visit the student portfolios link from the main page, a good one is Timothy's 7th grade one and Zachary's 2nd grade one. THe current school year is coming together nicely, but it is still pretty early in the year so many of the maps yet satand empty waiting to be filled during the upcoming studies. :0)
The subject area link is another good link to jump off from in our root map. We have now built up a pretty good set of chemistry, biology, physics, amd history libraries.
:0)
Tammy Moore