I have a WISP628 programmer and I use Bumblebee V2 software. I have used this combination successfully for a couple of years on several 16F628. Now I am trying to program a 18F6621. I can program/read/verify the code, but whenever I try to program the fuses, it fails to verify. The values that it reads back are completely different than what I sent, and completely different than all-zeros or all-ones. So, is there a trick to programming the fuses on this device? Thanks, Gavin -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist