Hoey

I dunno wat's wrong with my n1. The problem is that when i record with the mic, the little light goes on, and those two little bars flashes so I guess the sounds are going in. But when i playback, there's no sound and after a while, it says blankdisc. Then when i tired recording with OpenMG (dunno which version) the songs cheks out, but wen i play bak, same thing happens as the mic recording. I tried cheking in but it says cheks in failed. Help please?