start by opening CMD from the main computer and ping the 192 address... assuming the router is not also a firewall that should get a reply
if you don't get a reply then the network will need work done before you can talk to the printer... make sure the printer is actually turned on
Why is the printer being given a dynamic address on a class C network 192.168.*.* and where is it being allocated from? Why not just used DHCP from the router to allocate a class A address on 10.*.*.*