I have just come across a detailed (in French) hardware upgrade to the Lexia interface by devildante007 which you may with to consider.

http://www.tlemcen-electronic.com/fo...ad.php?t=43964

Today I did a test on a Peugeot 206 and nothing, I think the cable is out of order.
I will re-contact the seller to see with him

This is the same as mine:

http://www.aliexpress.com/item/Facto...74_75,201409_1

Lexia 3 Diagnostic Tool Description: (taken from the site)
1.It is compatible with Citroen cars including: C1, C2, C3, C4, C5, C6, C8, CCROSSER, NEMO, BERLINGO, JUMPY, JUMPER, AX, SAXO, BX and so on.
2.It is compatible with most Peugeot cars from 1995.
3.Diagnostics is performed via OBD-II connector (which is located near steering wheel) or via manufacturer-specific connector (only older cars, pre-2001).
4.lexia 3 Full Chip Firmware Serial Reference Number: 921815C/

This is mine:

http://www.ebay.fr/itm/PP2000-Lexia-...item54079d626b

I see with the seller for warranty before doing anything.

PP2000 Lexia 3 Diagnostic Interface Scan Tool For Peugeot Citroen V7 V48 V25
Brand New!!!
- Lexia 3 Interface Supplied With Diagbox V7.33 Stable Full Version,Interface works on Peugeot 307 and Citreon C5.

If they confirm the C5 and 307, it is good, also it has a couple of extra connectors.
Good Luck.