Google maps not showing on new PC

Google maps not showing on new PC

We have Opmanager running nicley and I have our branches placed onto a google map which shows fine on my PC.  (I have added the maps.html file to the directory on the server)
 
But if I log on to a different PC the Google map does not show and it displays the message about adding the maps.html file for hte api.
 
Anyone know why this would be?
 
Rob