why some of .mid file cant play on my nokia 3200 but some do,what exactly type of .mid file would nokia 3200 play?

I could be something about how many poly voices your phone can play.... my phone can play 40 poly voices at once, and i have the k700i, and your phone is much older, so it could be that your phone cant play so much voices at once, try to check your offical nokia page and go to specification on your 3200

' Advanced polyphonic ringing tones (MIDI) with up to 16 chord polyphony' - nokia.com

that's what i found out,btw what does it means by '16 chord polyphony'?...how to convert midi file to 16 chord polyphony?..is there any converter or midi editor?

chord (voices), you can use PSM player to remove chords.... if your phone only plays 16chords, you must stick to it... the psm player can be found in my website under my signature.. you can also find great midi songs there (not full songs), but real good midi ringtones

how to change my .mid collection to 16 chord using psmplayer...i cant find any button to convert to 16 chord mid,i just found convert to .mmf 16 chord... :<

I thing you must do it manual at the bottom on the PSM player in the boxes that is marked... You remove chords there... After doing this, go to file and create midi

hmm....i dont know how to remove chord using psmplayer...can u show me a tutorial...

I dont have any current turtorial, dont have time eather... Try some times, you will find it out then, thats how you learn about things.. Fail and learn