Problem capturing 1080i with Decklink Extreme

Hello,

I'm having problems capturing a 1080i signal with my DecklinkExtreme. My camera is plugged (Sony 1500). If I open the Media Express application I can see the image correctly. On the other hand, if I run the DecklinkCapture utility from the samples I'm unable to get a correct image. I'm unable to select the 1080i format (only 1080 Psf formats are available) and the image I get is in consequence not good. (The image I get is something like interlaced but in big blocks.)

Could anybody help me? How should I modify the Sample code to be able to capture the good image?

thanks

Sergi