I hope to be in the right place to post

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Hello everyone .... I have a problem with the procedure of fast dualboot on a DIA002 ... following the ultimate guide when I put the switch 01000000, a black screen appears on the screen instead I should have "connect the controller and so on." with no HD activity.
when I put the switch 00000000 I get the known writing on the screen.
I soldered all the cables I think pretty well and i have a valid dump 3.55....
I try flashing the patch file step more time as suggest by baylescream but nothing....the problem is still there...
help me to fix it....thanks....