TC doesn't share Internet

Hi, im from Spain and maybe my english is bad.
I just recieved my new Time Capsule 1Tb last generation. I have a router 3com 812 without DHCP, so i connected my TC to my router in the WAN slot. I opened Airport Utility and change the options. I used Bridge mode and Manual IP to configure it. I pushed in Create a new wifi network and i can enter to my TC from my Macbook with Airport. But my TC doesn't give Internet to my Macbook. The TC light is green and my router light for TC port is green and sharing information, i think.
Have i to change something? How can i have Internet connection with my TC wifi's?
Thanks for your time and sorry for my english.

If i change the range it says double NAT.
That means that another device is also providing DHCP and NAT services on the network. The correct setting for your TC would be "Bridge Mode".
I'm sorry for the confusion. I understood that the TC was the only device providing NAT and DHCP services. That is not the case.
You could try to "ignore" the Double NAT to see if that helps, but Bridge Mode is probably the correct setting for your TC.
Message was edited by: Bob Timmons

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