XBee series 1 no response from serial

I’m using 1 XBee S1 and 1 XBee Pro S1 with the XBee explorer. For the serial connection, I’ve been using Tom Igoe’s Serial Terminal for Processing and the XBee Terminal Max. They both seemed to work for a short time, and it seemed that I was able to program the XBees with the proper AT commands. After a while, though, the XBees stopped returning anything from the serial port. I’ve also tried using them with Arduinos using this tutorial: http://www.faludi.com/itp_coursework/me … ample.html, but also with no luck. I’m doing all this on a Mac, so I can’t use X-CTU.

Does anyone have an idea as to why they seem to behave so erratically or why they would stop being recognized by the serial port? This is really driving me nuts!

Thanks for any help!

I also noticed that the XBee Explorer shows up in the list of serial ports, but I’m getting this message:

WARNING: RXTX Version mismatch

Jar version = RXTX-2.2pre1

native lib Version = RXTX-2.2pre2