http://wordpress.org/extend/plugins/events-made-easy/
If the template you are using has an embedded Google map and only an empty box is showing, the cause might be a conflict with Events Made Easy.
This plugin still uses the Google Maps API 2 which is loaded in the head of every page instead of just the pages it is needed on.
Connections uses Google Maps API 3 which is only loaded on the page foot where it is being used.
When the request for the map is sent to Google, it is using the Google Maps API 2 because it was loaded first in the page head by Events Made Easy. The map request from Connections is sent in the Google Maps API3 format which causes a JavaScript error and the map fails to load.
Unfortunately there is no fix for this conflict. The developer for Events Made Easy would need to alter it so it only loads its JavaScripts on the pages where the plugin needs them.
NOTE: This FAQ was written based on Events Made Easy 1.0.1

Hi Steve,
I’ve got cmap installed and until recently everything was working fine. But all of a sudden I find that google maps will not display in the tray (I just get a blank page ). I checked your known Theme and Plugin conflicts but they don’t apply to my site.
I’d appreciate any feedback.
Thanks,
Will
@Will
I just responed to you in the support forum … let keep the conversation going in there. Thanks!
Hi, I activated the cMAP template but do not see the individual business-card type of image under each contact in the directory. Nothing changed except width size of directory listing is smaller now. Is this compatibility issue? Thanks.
Actually, [raw][connections][/raw] worked. Thanks.
When I click on “show map” the page reloads and the map is empty.
I have tried deactivating all of my other plugins, but the problem remains. I am using an unmodified Twenty Eleven Theme. Any ideas?
@Robin
Have a link you can share so I can take a look?
I have found the problem. It is a conflict with Comprehensive Google Map Plugin. I have put a question in the support forum.
Thanks for the quick response.