Hello,
If you still didn't setup your Google Map API Key for your domain you should get the following notice:
The Google Maps API key used on the web site was registered for a different web site...

So follow the next steps to resolve this problem:
- go to page: http://code.google.com/apis/maps/
- here click on: Sign up for a Google Maps API key. (top right corner of screen)
- here you should accept the Terms of Use and fill your site URL in "My web site URL:" field (do not forget about http://).
- during this process Google may ask you about your Google Account, you need to have it and be logged in!
- finely you have the API code like this:
ABQIAAAA2A54P95P07sZuiNZzuva6RT2yXp_ZAY8_ufC3CFXhH IE1NvwkxQKESmvQRMq380q7KaOPZ3hcWMYlg
- save this code
- go to Admin Panel > Configurations > Google Map
- put API code in "Google Map API key" field and save the changes.

If you done all steps right the Google Map should works now.

Thank you for your attention.