Private IP address on WAN port, will Router work?

We got leased line (RJ45 cable directly to home), we have 2 PC's,
connected through Router, the WAM IP address is: 192.168.25.234 and LAN

side it is using 192.168.1 subnet (192.168.1.2 and 192.168.1.3), once
enter all WAN port details, th esetup wizard not finishing, and we are
not getting internet through Router. If we connect the cable directly
to PC and configure that WAN IP address (192.168.25.234), it works, but

one PC at a time, I tried both PC's, it works individually, if we
connect through Router, nope. Any suggestions, thanks in advance.


(This is ISP giving service to home, they come home and hardcode this
static IP address into PC (192.168.25.234), instaed of hardcode into
PC, we asked them to configure Router WAN port, so that we can connect
two PC's to Internet, both PC's connected to Router LAN ports, this is
available in Asia, they won't give public IP addres to home, instaed
they run RJ45 cable to home and hardcode this private IP address to PC,

if we want both PC's, then they are suggesting us to take 2 cables for
both PC's. I bought this router and connected, will it work in private
IP address case?)