User name and Password for RB450G mini router

We finally reset the ip default to 192.168.88.1 successfully, but now using Winloader V2.2.15 the username/password is not being recognized

We have used:

admin/admin
admin/password

Thanks again for your support

Please read the manual for FAQs.
http://wiki.mikrotik.com/wiki/Manual:RouterOS_FAQ#Logging_on_and_Passwords

What is the username and password when logging on to the router for the first time?
Username is ‘admin’, and there is no password (hit the ‘Enter’ key). You can change the password using the ‘/password’ command.