Can somebody help me on this, i was not able to access my rb using winbox because i forgot my password. i tried to press the reset button but nothing happends. pls help me. thanks

NetInstall it and uncheck the "keep configuration" checkbox. You will obviously lose your configuration.

You need to hold the reset button in while you plug the power in then probably for a good 30 seconds while it boots. This will remove the configuration in the process.

If you have a valid backup file, there iso an unofficial and unsupported tool which can usually extract the password from the .backup. I haven't tried it on an RB Crossroads, but I know it works on other mipsLE devices (532 & 411). I have used it in the 2.X and 3.X firmwares, but I haven't tried anything past that. It does need to be compiled and run on a linux system, so it isn't the best plan if you aren't comfortable with that. If you still feel inclined to use it, a little googling for a tool called MTPass by Manio should get you there.

Thank you guys for the help. now i need to reconfigure this thing...

there is another way to find out lost or forgot password without pressing reset button or reconfiguring router.

mikrotikpasswordrecovery.com/

just enter the URl and then upload your last backup file of router which you need.

And then that website has the IP addressing of your router, and the usernames and passwords. Because you uploaded your entire configuration.

So I'd personally use that with care.