Map does not appear

Hi,

I'm sorry if this is a duplicate of another issue - Im not 100% sure if that's the case.

I've enabled the gmap, gmap location and location modules and added a location field to my content type and set the location field to display either address with a map or just a map but I never actually get a map, just a link to google maps. Am I doing something wrong or is this currently not working properly?

Help would be greatly appreciated. Thanks!

A link to the page in question is:

http://tennishq.co.uk/tennis-club/kent/sidcup-crescent-lawn-tennis-club