i have got some discovery school educational cds.when i play them in win95,then only they play but even video could not be seen and even sound could not be heard.also,suddenly it pops out and says mTropolis windows player has encontered the problem.but they never play in win XP,which is installed on my PC. so,please tell me what to do and there requirement of downloading a software for that purpose or is there any error in my computer.
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