whats up guys!

some days ago, i want install a typeR tachometer on my friend's Eclipse, its RS 97

I put the + wire in a fuse on fuse box inside the car, i use a tester and find a fuse that work's with the ign switch.
The wire of light i leave this un-connect because the light of tach doesn't work lol
The ground wire in the steel of console
the rpm signal wire, i put this on the white wire on the ECU. but...

The tach doesn't work!!

what can i do?

i search but all thread says the same thing "rpm signal wire: white wire of lower harness"

Help me please!!

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95 Eclipse GS+T.. Garrett t3
MEXICAN DSM 420A TURBO! 1/4 mile: 14.830 @ 6 psi 14.725@100 mph .. 9 psi & open pipe TRACTIONLESS
stock inj, stock mounts, 12:1 vortech fmu, bkr7s at .032", 93 oct, walbro 255, stock clutch.. etc

I HATE SR20DE
http://www.youtube.com/rettez