java.io.FileNotFoundException: This file can not be opened as a file descriptor; it is probably compressed

i am programming a soundboard from android. the problem is that some sounds works, and some dont work. here is the traceback that i get for the sounds that doesnt work

05-31 13:23:04.227 18440 18603 W System.err: java.io.FileNotFoundException: This file can not be opened as a file descriptor; it is probably compressed
05-31 13:23:04.227 18440 18603 W System.err:    at android.content.res.AssetManager.openAssetFd(Native Method)
05-31 13:23:04.227 18440 18603 W System.err:    at android.content.res.AssetManager.openFd(AssetManager.java:331)
05-31 13:23:04.227 18440 18603 W System.err:    at com.phonegap.AudioPlayer.startPlaying(AudioPlayer.java:201)
05-31 13:23:04.227 18440 18603 W System.err:    at com.phonegap.AudioHandler.startPlayingAudio(AudioHandler.java:181)
05-31 13:23:04.235 18440 18603 W System.err:    at com.phonegap.AudioHandler.execute(AudioHandler.java:64)
05-31 13:23:04.235 18440 18603 W System.err:    at com.phonegap.api.PluginManager$1.run(PluginManager.java:86)
05-31 13:23:04.235 18440 18603 W System.err:    at java.lang.Thread.run(Thread.java:1096)

any ideas?

There is a limitations on opening compressed files in the assets folder. This is because uncompressed files can be directly memory mapped into the processes virtual address space, therefore avoiding needing the same amount of memory again for decompression.

Dealing with Asset Compression in Android Apps discusses some techniques in dealing with compressed files. You can trick aapt into not compressing the file by using an extension that is not compressed (e.g. mp3) or you can manually add them to the apk without compression instead of getting aapt to do the work.