I cannot flash P89LPC9408. I am using LPC900 EPM emulator/programmer to flash. While configuring the EPM900 flash programmer, I could find the P89LPCP408 in the device options. But in Options for Target1/Device TAB i can select P89LPC9408.
When I tried to select compatible other compatible P89LPC9401. I got download error saying 'Target device is not P89LPC9401'.
have you tried to use straight FlashMagic, no "uVision link" or such?
If straight FlashMagic fails, I think Andy Ayre may have an answer, try posting at forum.flashmagictool.com/index.php
Erik