IP address on router serial 0/0 overlaps Ethernet 0/0

I have uploaded two screen shots called pruss09 1 and pruss09 2.

The first router off the server is in question. I have included the error message I receive.

Thanks again for your support!!!

I'm new to Networking and currently in the CCNA 1 Class.
I'm creating a network in Packet tracer and having an issue assigning an IP Address to the Router Serial 0/0. I receive an error that it "overlaps ethernet 0/0". I have subnetted a network address to use 8 subnetworks. I can ping the routers from all host and servers on the different subnets. I am now trying to assign the IP addresses in the Routers.
I'm not sure why I receive the error "overlaps Ethernet 0/0" when I try to assign the IP to serial 0/0.
Ethernet 0/0 on the router is set to 100.106.160.1 and the router Serial 0/0 I'm trying to set to 100.106.162.2. Could someone explain why I would receive this error when the addresses are different subnets?

Thanks, your help would be greatly appreicated!!!

I have uploaded two screen shots called pruss09 1 and pruss09 2.

Yes but we can't see the link. imageshack gives you a link, please post it here so we can see the screenshot. You could also place the link inside [img] [/img] tags so that the image shows directly in your post.