You will always use your district username along with your current district GMAIL password to log into Infinite Campus. If you believe you are doing that, try these tips:
Log into your district GMail account on a new screen and see if GMail wants you to set a new password. If GMail thinks you need a new password, Infinite Campus will not let you log-in until you change your password and start using the new one.
If it is asking you to enter the special Captcha characters at the bottom, make sure you RE-ENTER your username and password and THEN enter the special Captcha characters that are displayed.
If you are having issues logging into Campus using the correct credentials, please contact the district at Eversomm@mcfsd.org or 608-838-4528.