But for future reference, can I use speaker wire?
As I mentioned before, some speaker wire is too thick for some breadboards. I no longer have it, but I got a thicker wire (20 gauge?) from Radio Shack when I was just starting out. It worked on my first breadboard, but it was too thick to use on the second breadboard. I also found because it was thicker, that it was harder to bend and cut into shape. So if it fits, it should work.
I believe when I started looking at the wire gauges, I noticed that speaker wire is not a well defined term, and I've seen things for sale as speaker wire that were different gauges.
I've also gotten 24 gauge wire, and there it falls out more easily on the breadboard. The normal hookup wire is 22 gauge. For breadboard work, solid core is better than braided.
Here is a wikipedia article about wire gauges: http://en.wikipedia.org/wiki/American_wire_gauge