Q: Sound Recording Problems on Lombard

I wanted to use Coaster or something like that to record into my Lombard on 9.2. I got a cable that goes from one source (headphone jack) to another (microphone jack). I tried plugging in my iPod and also my iMac G5 and it sort of worked. But it only came in on the left side. I checked, and the stereo sound playback of music on the Lombard works fine in iTunes, but I tried four different freeware and shareware programs and got left-sided sound. The programs with an indicator show only the left side inputting, and playback is also only the left speaker. I did in the past record off a "real" stereo with Coaster by hooking a y-cable to the speaker ports and the other end into the mike port of an iMac 600, but the stereo is dead and I no longer have that iMac.

When I get it going right I will be recording off tapes by connecting to a boom box with a tape player, to preserve what's on them. Does anybody have a suggestion? Is it the cable's fault? Is it a funky mike port? Would it maybe be useful to try something in Jaguar?