DM500s not connecting to dreamup

[mini]

I am unableto get the DM500 to connect to dreamup (tried every version), I am able to get some connection with Putty and serial cable and its all gibberish though.
Does thuis mean I need to jtag, if so what cable is it from usb to ???

if i take the ground lead off it recognises dm500, wontn still let me flash... a bit puzzled
connected through hyperterminal without ground lead attached. its not gibberish any more. can someone let me know if i can flash dm500s through it without ground lead. or any resolution to fix ground problem...

thanks for all help

[mini]

this is what i get without ground lead conneted

Dreambox DM500
loaded at: 00500000 0060016C
relocated to: 00400000 0050016C
board data at: 004FE124 004FE16C
relocated to: 00405194 004051DC
zimage at: 004058D1 004FD90E
avail ram: 00501000 02000000

Linux/PPC load: console=null root=/dev/mtdblock5 rootfstype=squashfs ro
Uncompressing Linux...done.
Now booting the kernel

tried to jtag. without sucess. I need help pls ����

I did get it to connect on jtag just the once, it confirmed the box and that was it.

[mini]

421829

the connection is different than thr 1 posted on here. i did get it to read the box but thats as far as i got. i managed to takr off soldering pad on board ��
abit tired will somehow try and repair it.... any suggestions peeps.
also is the diagram I've shared correct.