Did you plug the fans into something ? I don't know what the CPU fan header rating is on that board but check that your amperage load is less than half the header rating.
Have you combined the two fans onto a single cable w/ a splitter ? If they PWM fans, you will need a PWM splitter. Not having used a V6GT, I can't tell ya if CM provides those for you.
Also, if ya connecting the CPU fans to Molex connectors from the CPU, the machine might not boot up if BIOS is set to stop startup unless it detects a working fan.