arduino micro can't upload

Hello

I have somme problems with my arduino micro. After a few uploads he wouldn’t upload anymore and give the following error:

This report would have more information with
“Show verbose output during compilation”
enabled in File > Preferences.
Arduino: 1.0.6 (Windows NT (unknown)), Board: “Arduino Micro”
Binaire sketch-grootte: 6.150 bytes (van een 28.672-byte maximum)

avrdude: ser_open(): can’t open device “\.\COM13”: Het systeem kan het opgegeven bestand niet vinden.

avrdude: ser_send(): write error: sorry no info avail

I work with windows 8.1. The port is normally right.

Thanks
Josejos