I have a pile of XTL1500 and 5000(W7) radios I am trying to flash up to current flash/DSP using the "Dirty Method". I have tried using a serial to the head, serial to the radio, and USB and am having no luck. I get into flash zap and the software runs through the procedure and no joy. I have gotten 2 to flash up but have no idea what worked. I am missing something simple I know but can't figure it out. I have read all the posts concerning this process and just can't get it to work reliably. The XTL1500's are R9 and the 5000's are R7. Any help will be greatly appreciated. I am using R17 flash files. Thank you