Problems with Raven / NS9750 evaluation board

Hello together, I’ve worked with the StrongARM processor so far. Now I’m starting with the NS9750. But I can’t contact my evaluation board “NETS-Support NSDEV9750P-GR62” with the Raven Debugger. I work with the “NET+Works with GNU Tools Tutorial”, Release Date April 2005 At page 13 I entered “NS9750_A” as my platform. But I got stuck at page 15. I’m always getting “Error 43” All cables are connected, the debugger and the board both have power. I repeated the test with another host computer with the same result. The board seems to be alive, because I receive a welcome messages over the serial Port. But I still can’t access the board over the Raven debugger.