Cubase 6.5 MAudio Delta 101 Access Virus TI Issue

I run Windows 7 and have a maudio Delta 101 sound card. I connect my virus TI to an audio input and the audio sounds fine, however as soon as I open Cubase there is no audio and I can see that the audio is no longer being input to my sound card.

I have created an audio bus for the audio channel
I assign that bus to the audio track I wish to record on
I have ensured that the output of the Virus is set to audio

My other synths work fine is this a virus set-up issue?

Many thanks for any help