I am having problems with windows media player skipping?

When my media player runs (wmp 10) it acts like a scene per scene rather than a smooth flow, I have noticed that the audio is skipping as well or is not smooth either. I am running windows Xp Pro. 1.4 mhz athlon thunderbird chip on an epox board. I have 1.4 meg of memory on board and the sound card is a sound blaster 24bit, video card is 256 meg Diamond Stealth. I had to reinstall windows recently and since I have had these troubles.