rendering stuff from virus as wav?

[Wandering Kid]

so ive played around with my virus for a bit and now i wanna render it, reimport it as a wav file in floops and pile some VSTi effects on it. how do i do this? i have my delta 1010 sending midi out to the midi in on the virus. virus generates the sound from those instructions and sends it from the stereo out into the stereo input of my soundcard. every time i render it, its just silence. nothing. have i hooked it up wrong or is there something i need to do on the virus before i can record it? thanks in advance.