First, use DMX cables. Second, the shield should be connected. Are you SURE these are DMX cables?
OK, the Eliminator ED15:
To start with, set the DIP switches as follows for BOTH(yes, we're duplicating addresses, deal with it):
It appears you need DIP switch 10 in the ON(up) position in Bank 2(the lower one). In the upper bank, Set DIP's 1-9 also to the down position(off). Then, set DIP #1 to ON. This should set the dimmer pack to start at DMX addres 1.
Ensure your cables are pin to pin.
One issue it appears is that the ED15 isn't a very good "player" in the world of DMX. Ensure your dimmer packs are set to pass thru, which they should via default.
The manual sucks.