Edirol UA 25

Hey I have an old computer with Windows 7 64 bit and a Roland edirol ua-25 hooked up. Looks like I've downloaded the proper drivers but for some reason even though it lights up and I get a signal from the headphone jack there doesn't seem to be anything coming from the output. I send that to a small Poweramp and then into a couple speakers but the RCA outputs don't appear to be giving me a signal. Any ideas?

WSS