Well.....I am actually going through something similiar. The difference is that I have a DSL modem/router single port and I am connecting that to a linksys wireless G router. I am still not successful with IE part but I know you have to open up the port you specify on the DSL modem router side. You first assign a static ip to your DVR and than you port forward to that ip address and it should work since your using the D-Link 524. I bought a DVR through CCTV specialty and I'm having connectivity problems with the software and the IE browser.
If your still having problems please post back and I can go into more detail on what the settings should look like. If you have gotten the D-Link 524 to work post back and let me know of your success.