Dear Piclist, I got, as suggested, the WISP628 kit. I put it together and it seems to do something. I try to program an 18F4520, using Bumblebee. Bumblebee reports correctly the WISP and the target PIC It seems to upload my hexfile What happens then is that verify reports 00 at the first location, this should be 0x90. Verifying stops after one error, but downloading the code shows that there are only 00 bytes. Any ideas about what could be wrong? Frank Abbing -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist