Suggest you break down your problem into single issues.
WMA should work on most MP3 players. Cannot understand what your question is about a Philips CD player.
my cretive zen is not recognised my my cd player. i have checked other mp3 players and they work or and also my flash drive is recognised. philips players recognice wma files which is what my files are. what is the trouble? do i neeed to convert my files and if so how?

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