You should not need any static routes or dynamic routes for your connected networks.
Do I understand correctly that the 803 is in your central site, and the dial-in client is a PC?
Check that the router interfaces have the correct masks on their ip addresses, 255.255.255.0, especially the Ethernet.
Also, check that the devices on the LAN know about 192.168.1.26 being a gateway.
Kevin Dorrell (CCNP)
Luxembourg