I have forgotten my password how do I proceed

Have you changed it from the default ?
If so you'll need to reset the unit.

Thank u Sir, please tell me how do I reset the unit? Thanks avertano

Reset is on the back.
You'll need a paperclip in the hole.

https://sites.google.com/site/techni...di524reset.gif

Thanks curlyben, after I insert the pin, what then

The whole process is detailed here: How to Reset the D-Link DI-524 Wireless Router