i can't access to router using 192.168.0.1 because i don't have the password. the default settings says that write admin in user name and leave the password box empty but i doesn't work. so i am asking if there is any way to reset the password of the router. thanks.
Welcome to the forum; yes, in most cases you can. There's generally a small hole on D-Link's router devices that allows for the inserting a pin or such like or maybe a reset button that restores to default factory settings.