What you're actually trying to do is create a Repeater Bridge, which is very different from a traditional Wireless Bridge.
A traditional Wireless Bridge allows you to plug devices into the secondary router, and only uses the secondary router's wireless to communicate with the primary router.
While having a Repeater Bridge expands your wireless coverage, it also technically cuts your wireless bandwidth in half, because the secondary router has to receive the wireless signal from your device, then rebroadcast it back to the primary router, also through wireless.
I have a Repeater Bridge set up in my home, but I've never tried using the default software. I'm using a pair of Linksys WRT-54Gs running a custom firmware called DD-WRT.
www.dd-wrt.com has downloads and instructions, but while many D-Link routers are supported, the DIR-605L is a "work in progress". Also, it probably goes without saying but while the process of using a custom firmware is supposed to be reversible, it's entirely possible to brick your router while voiding your warranty at the same time.