no output from recording or imported file in AI

Hi, I have just installed cubase ai 8 and set everything up as per instructions but i am not getting any output either from an imported file or my guitar recording. Im kinda lost on what to try next any help would be appreciated. Just to let you know i have been through the driver setup and vst connections and they look correct to me.

Update: I now have an output signal in f3 but still no sound. very frustrating it must be something simple i just cant see it.

ok guys final update.
I have managed to sort it! I removed the steinberg usb driver so as to re-install and hope that worked and well before i installed again the generic usb driver was working it for me.
Now time for a beer…