I tried:
1.changed my PC ip address manually to 192.168.0.1,connected to old router,but cant access users interface.
2.changed my PC ip address manually to 192.168.0.2,connected to old router,but cant access users interface.
3.changed my PC ip address manually to 192.168.0.1 and 192.168.0.2 also added default gateway 192.168.0.250,connected to old router,but cant access users interface.