[Ham-Mac] 756ProII - Tigertronics SL 1+ Help!

[Richard Hemingway]

I am sending the following to both the ICOM and Ham-Mac groups:

I am using an IC-756ProII and have been attempting to connect it up 
with a Tigertronics SL 1+ unit and using multimode on an Apple G5, 
iwth an 8 pin DIN cable to the accessory socket #1 on the Icom

I have it all together and the I believe that the jumpers on the JP1 
are correct, as to the ground, PTT and power.  I have a problem with 
the Mic jumper which I have connected to pin 4 on the Icom which is 
the  so-called MOD input.

When I try to TX with the MultiMode I get the PTT light on in the 
SL-1+ unit but have no output power from the radio.  In the 
troubleshooting section of the SL-1+ manual it says that when this 
happens that the jumpers are wired incorrectly. If it is I don't know 
where the MIC should be wired as to the ICOM.  Also, the screen shows 
a signal both in PSK and CW when it is keyed, but I have no power 
out. I have the sound output on full in preferences.

Any IC756ProII owners out there that have the Tigertronics SL 1+ unit 
that can  tell me what I am doing wrong??