Nokia 6600 Problems!!!

I have questions about Nokia 6600! PLZ answer these?

1) I have installed "errrd.sis" to my Nokia 6600 to show the error codes of applications. But I don't know how to learn which code belongs to which error! How can I learn them?

I have installed Mp3 player v2.1 to my Nokia 6600 but it closes after 5 or 6 songs listened from playlist and "App. closed Mp3player code 9 9" error signal is seen! What may be the problem?

is the mp3 player demo??? anyway u should use ultraMP3, its better. dont know anything about this "error" app