Are the LEDs on the External module lit up? if not the cable is in the wrong way around.
If it is in the correct way try turning the cable around, so plug external module in in the demon and the demon end into the module.
If it still doesn't work try bending the metal contacts on the ribbon a LITTLE bit so the make a firmer connection.
thanks got it working messed with a few things cant read nand but cant create ecc error heres log
===================================================
12 August 2012 19:53:37
J-Runner v0.2 Beta (279) Started
Checking Files
Finished Checking Files
Reading Nand to C:\Users\Nemesis\Desktop\Xbox RGH\J-Runner v02 (278) Core Pack\output\nanddump1.bin
XBOX360
Hardware : Demon Phat
Firmware : 1.0
Flash ID : 0x73AD Hynix (16MiB - Small block)
Flash Size : 0x400 blocks of 0x4200 bytes
Reading Nand
Done!
in 0:21 min:sec
Reading Nand to C:\Users\Nemesis\Desktop\Xbox RGH\J-Runner v02 (278) Core Pack\output\nanddump2.bin
Initializing Nand..
Header is wrong..
Reading Nand
Done!
in 0:21 min:sec
Comparing...
Nands are the same
Programming Coolrunner
C:\Users\Nemesis\Desktop\Xbox RGH\J-Runner v02 (278) Core Pack\common\xsvf\jasper.xsvf
sending xsvf to demon...
Done
* unpacking flash image, ....
UnECC'ed
* found decrypted CD
* found XeLL binary, must be linked to 0x1c000000
* we found the following parts:
SMC: 117.78
CB_A: missing
CB_B: missing
CD (image): missing
CD (decrypted): 8453
Failed to create ecc image