Hi, is there any particular requirement besides the listed below, to make this part communicate to the ICD2? Pins 26,38,57 (Vdd) has 3.3V Pin 19 (Avdd) has 3.3V Pins 9,25,41,56 (vss) are GND Pin 20 (AVss) is tied to GND Pin 18 (ENVREG) is tied to Vdd Pin 10 (VddCore/Vcap) has a .1uF ceramic and 1uF electrolytic capacitor in parallel to ground. Oscillator pins have a 10 Mhz crystal and 2 33pF caps. PGC is pin 42 PGD is pin 37 MCLR has a 10K pull up resistor, nothing else. When I try to connect to it with the ICD2 (MPLAB 8.01 and latest firmware), it reports the invalid Id error (0x00). The MPLAB ICD2 status window reports the self test all right and the voltages are 3.3V for Vdd and Vpp and 11.02V for MCLR Vpp. Regards, Mauricio -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist