I am using win xp, I bought a wired network card at walmart, model NC100I-WM, it says it works with win 95,98,2000,ME, and Xp. I took out my dial up modem and attempted to install this new card and it would not fit. I put my dial up modem back in with no difficulty. Is there some reason this card will not fit in my pc? Do I have the wrong card? The phone company told me that the one they recommend is about $30 at Office Depot, this one at walmart was about half the price.