Gamenow Theme frompage image problem

Hello guys, how are you ?

I contact you because I have a problem with the Gamenow Theme. I can’t see the big image in the thumbnail. This is the error:

http://prueba.argensymbian.com.ar/wp-content/uploads/2010/09/GameNow_Problem.JPG

Can anybody help me to show the big image on the thumbnail?

Thanks in advance.
Millher