We suspect that the gateway may still be configured with it’s default IP address. Please issue the command ifconfig -a and if the eth0 interface IP is 192.168.2.1 then that is the case and the gateway will either need to be configured to receive an IP address from DHCP or provisioned with a static IP address that is applicable for your network.
Depending on whether this is an mLinux model or an AEP gateway will determine how those changes are made. For the AEP model you will configure the gateway for DHCP or for a static IP through the web interface and for the mLinux model you will need to manually configure the gateway.
If it is an mLinux model this will require knowledge of vi commands to perform the update