HDMI connected but TV showing connected as DVI
 

My TV is a Bush (Cello) c32109dvb-3d and even though I have an HDMI cable connected to the V+ box and TV and selected HDMI (1) it thinks it's connected via DVI and so I don't get any audio. At firstit displays HDMI then it says it's connected by DVI.

I've tried all the HDMI ports and diffrent HDMI cables but I get the same result. If I use my WD Live box it works fine.