login to www.routerlogin.net fails when using factory password and admin?

Hi everyone. I tried posting this question before but do not think it went thru.My admin password is not working. I properly reset the back of the modem and tried using (admin.password) , tried my old password , etc. but it wont let me in. I also tried cutting  the power, reset with power on or off and repeated the reset but to no avail.   I can still access the internet just not admin login. I did get in a week ago, it said there was a firmware update and tried updating it but was the same version so I dont know if it updated. Also the wierd thing is that there was no recover password checkbox like the manual says in the advanced settings. I also do not remember if I did change the admin password or not.Any suggestions? Thank you for your time.