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We've built our own boards exactly per the specifications. Out of the 3 we made, one doesn't work. BUT two of our boards have the green indicator lights and are detected by the USBDM-1-JS16. We can erase, but when we try to load with get the message: "Verify Failed" Verfication of the target flash failed. Reason: Program Data Not within target Flash Memory

Can someone help us as to what is going wrong?