Well, it just seems to get stranger and stranger. Thank you SteveG for your response and continued support. No matter what combination of Device and File Channels, I'm only able to record in mono. Is this a Creative thing? I'm basically converting old cassettes to digital files (archival) so I don't need anything super high end, but functional would be great.
As a thought, I'm running an RCA female/ 3.5mm audio male cable from the cassette player to the sound card. Is this the source of the problem? (Other than latency, quality, etc. This is a low-budget enterprise to start with.)
Thanks again for your responses!
As long as it's a stereo cable, it should be fine. So it needs two RCA plugs for left and right, and a tip-ring-sleeve 3.5mm plug. If it's only a single plug, then you'll only get mono. If it's stereo and you are still getting only one channel, then it's possible that the lead is faulty - this is far from being unknown!
If it's none of the above, then I'd certainly look very suspiciously at that Creative Labs device. And this may well be the case, as you've said that using it as a mic input, it's (overloaded) stereo. Does this device have any sort of a control panel? Anything interesting to see there?