Bob Bullock wrote Ya, I know exactly the problem your having, I went through exactly the same process and it just drove me nuts. I can't remeber how I stumbled on the answer but it was more luck than anything. The secret is simple, the configuration bits are specified when you program the chip, and not in the assembled program. Bless you Bob! I have downloaded and run through the tutorials that come with MPLAB, so I do remember where you are talking about. I have an older Xeltek SuperPro programmer with an adapter for the 17C4X series I will be using to burn the chips with. I hope that the configuration information is something that is embedded in the hex code so it would work with any programmer. Thanks again, David V. Fansler Network Administrator AutoCyte, Inc. 336-222-9707 Ext. 261 dfansler@autocyte.com Now Showing! www.mindspring.com\~dfansler\