Ubuntu 9.10 Server Networking Issue

[Plano]

I have Ubuntu 9.10 Server Edition installed and were having a program connecting to it remotely. We know the machine itself can actually connect to the internet itself just fine, but it's having a problem actually connecting to anything over our intranet or local network. I can't ping any PC's straight from the server itself or from one of our PC's to the server... Please help.

Thank you.

[Jeff Anthony]

what are the LAN IP's of the router, server and one of your other computers you're trying to access the server from?

[Plano]

The Servers IP is static, set to
135.59.98.16

The PC trying to connect to Sticky DHCP:

135.59.98.217


The Router itself is 135.59.98.3 (gateway ip), or it could be 135.59.98.0

I'm fairly new to this so sorry if i'm mixing things up.

I can ping the gateway just fine. (135.59.98.3)

[Plano]

Anyone have any idea's on this?