I suspect that you are not (sadly) going to win with your current setup. Premiere is looking for digital input via yor camer's iLink (or firewire) port.
S-video is an anlogue port. Also, a shame about the camera. From memory, the 15 does not have a2d passthru either.
I think you'll need an analog-2-digital convertor to win with this one.
Alternatively, if you have a free PCI clot then you can pick up a firewire card for less than £20 UKP and then do the job properly making the best use of your camera

Actaully this is botha better and cheaper solution i think.