[Google Maps API v2] I can not view map in my site

in my site :
http://rehlaty.sanabl.com/www/tourism/Article/action/HotelDetails/SecId/3/Id/7/

I am using Gmap Plugin (http://gmap.nurtext.de/)

I was added a valid Google Maps API Key but always I see this
message :
"This web site needs a different Google Maps API key. A new key can be
generated at http://code.google.com/apis/maps/signup.html."

Can you help me please to solve this issue?

Thanks

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