First our apologies and thanks for the patients of folks having problems. It turns out that the new Surface mount version of the emulator (REV 2A) had an address line problem that would only show up in certain cases - We have a software fix available - This fix will 'break' older versions of the emulator and should only be used for the Rev 2A board. You can download it from http://xtronics.com/memory/EPROM.htm

How do you know if you have the rev 2A board?

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355 10:1 , AFR 190 heads, LT4 HOT cam w/ 1.6 roller rockers, complete Superram intake, 58mm BBK TB, 24# injectors, screens out of MAF, MAT relocated, March underdrive pulleys, Streetdampner, Crane HI-6 ignition, 160 thermostat, K&Ns, TES headers(Jet hot coated), Mufflex 4' cat back, B&M shift Kit, 2500 converter, and 3.27s.

look at the adapter board - it saysRev 2a on it - look carefully it is written in copper not the white silkscreen