the problem with use NDK in omapl138

I have some problems about using NDK,as this.

1. PC IP addr : 192,168,20.45 ,Subnet mask : 255.255.0.0.

2. Embedded devices  IP addr : 192.168.60.198, Subnet mask : 255.255.255.0,this Embedded devices using NDK module,we hypothesis it's Dev 1 at here.

3. Dev 1 as service ,and PC as client( common network tools on pc)

4.by using network tools ,I find PC  can communication with Dev 1, just I don't know that's why,can you tell me?

my environment is:

1. CCS version v5.5

2. BIOS version 6.37.2.72,XDC tools 3.25.5.94

3. NDK version 2.24.3.35, NSP 1.10.2.9