Podcast problems on my mp3 player

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As teh above title suggests im having rpoblems with my mp3 players and podcasts

I generally load up my mp3 player with any podcats ive downloaded IE Everything comes back to 2000ad, whilst listening to either the above podcast or any others my mp3 player cuts out and i have to power them up again and start miles away from where i was listening...

I dont think mp3 players are broken and teh podcasts play fine on my PC so im stumpped anyone had any problems like this and if so any idea why?.