Help wanted for Diseqc switch

[itshuang]

I got a 2x Diseqc 2.0 switch from Sadoun and hoped to connect two LNBFs with it. The switch is near the dish not the receiver. It's about 40' from dish to receiver. Reception is fine without the switch. With the switch, signal strength is much lower and no signal can be received.

Here is my setup:

Sat1: Nimiq1
Sat2: Galaxy4
LNBF1(Sat1): 11250, Normal, port A (-->port1 of switch)
LNBF1(Sat2): 10750, Normal, port B (-->port 2 of switch)
0/12v: o v
20k: none
14v/18v: none

Did I do anything wrong here? Please help!