Can't see cameras in web browser

[Woody70]

Can anyone tell me why I can'y see my cameras through my web browser.
I have them connected through a linksys WRT54G wireless router converted to DDWRT used as a repeater from my main router. They work through the repeater for my camera software but I cannot see them in my web browser, thank you for any help.

 

[sebastiantombs]

A lot more information might be helpful. Such as, the IP address schemes for each router, the PC and the cameras would be a good place to start. Also a simple sketch of the network electrical connection topology would be very helpful.