[Tinyos-help] Communication between Pc and motes

Hi, I try to communate with from the Pc back to the motes. I run the Lesson 6 example, found on the tinyos web site. And when I try to send data to mote by clicking the Clear Dataset button, but on the SerailForwarder window the message write failed is display. Can anyone help me. Mathieu.

[Tinyos-help] Error during installing application into micaz

Hello, First of all I want to apology for my English. I a student and I have to work with Xbow sensor. I start on Monday and today I try the Blink program give by Xbow. So I try to upload it on a MPR2400CA sensor (micaz) through the MIB600 Ethernet Programmers. I use, in a Cygwin window: