SegaXtreme

Hi. I've installed am29f200bb with pseudo saturn kai flashed inside my console and it's working.
Now i need to update it, but it doesn't work. Is it because the update cd doesn't have support for this chip or i messed the wiring?
The flasher utility reports this:
Flash Vendor ID: 0001 - Unknown
Flash Device ID: 2257 - Unknown

Write test: Data compare failure!
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