Hi All I get the same sort of problems since I upgraded to FW 3.0. The PS+ works fine with the older FW. Since the only change to the system was going from FW2.3 to FW3.0 I can pretty safely conclude that the problem lies with the new FW. I sent a message to tech support at Microchip but got back a generic answer 'Make sure you have the FIFO box not checked. All of our suggestions for communication problems with the PICSTART Plus programmer are contained in the PICSTART Plus help file under Troubleshooting Common Problems. ' I thought this was a bit insulting, as I had indicated in my message that I had tried all that already. Let us know if you get this resolved. Dave > I've tried MPLAB 5.70.00. I upgraded my PICStart+ firmware to the latest > version (3.0.00) and tried to read the contents of an 18f452. It hangs at > address 0x7FE2 and puts up a dialog box: > > Communication error > Cannot Receive..... > > [0000,00,00,54] > > I've also occasionally see the error: > > Connect > Unsupported programmer detected, 28 > > (I assume they're referring to the PICStart+ and not me.) > > I figured my 4 year old PICStart+ was now too old. So I bought a new one > and $200 bucks later see the same damn error. > > Do I have a couple of boat anchors now or does anyone know what may be > happening? > -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics