My Ps2 will play all my silver-sided games such as NBA street 2, gta vice city, mk deadly alliance, gran turismo, and nfl blitz 2003. However, when I try to play my purple-sided games such as Madden 2002 and Nba Street it won't work. It makes a funny noise when trying to read the disc. What could be the problem? I have a v5 ps2.