Dear K.piyabhut,
Please try to re-install the program.
And I would like to know what is the main problem.
1. RDC udon can use internet?
2. Is there a problem only GNEXS?
3. RDC udon can’t use only COD function? Or can’t open other function? Give me more detail.
4. Did you checked internet settings? Ex) fire wall
If problem was founded only GNEXS, I ask IT Korea team to check