I have a Toshiba P205

Question

I have a Toshiba P205 laptop and have been running external Bose speakers due, primarily, to the fact that I keep the top closed and the Harmon's are muffled. My daughter recently unplugged the speakers and used them on her iPOD and not I'm unable to get the Toshiba to recognize them -- it defaults to the internal speakers. Any recommendations, please?