Communictation between DL.3 and Computer

Hi,guys,I have two DL.3S running version 1.4.3.
They originally run version 1.4.0,everything is fine,but after I update the fixtures to V1.4.3,I can't find it in CMA(even I connect it directly).
The computer's network configuration is same as what it used to be.
I connect the computer to one of them directly with non-cross network cable,then I launch the CMA,on the right bottom of the CMA window displays 169.*.*.*(I can't remember the last three rang numbers),and the DL.3 network card LED is blinking,so I think the DL.3 network adapter works and the DL.3 and computer are talking to each other,but I can't find it in CMA.
Does re-image helps ?