Im using the virus with a focusrite interface, two audio leads in and two midi leads in. Everything is working perfectly in ableton and has been for ages apart from the VST! You need the the USB cable to be connected but everytime I connect it it knocks out all the audio and midi from the virus. Bit annoying at the mo as its the last thing I need to sort.
Any help would be greatly appreciated! Cheers 
[quote]admukey86 (31/12/2010)[hr]Im using the virus with a focusrite interface, two audio leadsin and two midi leads in. Everything is working perfectly in ableton and has been for ages apart from the VST! You need the the USB cable to be connected but everytime I connect it it knocks out all the audio and midi from the virus. Bit annoying at the mo as its the last thing I need to sort.[/quote]
What you’re describing is the default behavior of the Virus. As soon as VC is loaded, the Virus assumes it will be controlled via your DAW, so it stops responding to the MIDI ports and uses USB only.
I’ll need more details on exactly why you need the ports when VC is open, but you can easily access them with VC open by sending/receiving MIDI via ‘Virus MIDI’, which can be enabled in the Ableton MIDI preferences. This makes it easy to use the Virus’ MIDI ports to control external gear, while still using VC from within your DAW.
Hope that helps.