Use Fris instead: https://fris.x10hosting.com:2083/
https://x10hosting.com/control/login.php
Go to Account Panel above. Sign in with Forum username/password.
1. Go to Hosting and try to use 'Login to cPanel' button.
2. Change password ('old password' is current Forum password). This will change it to the same password Forum and cPanel. Wait 5-10 minutes for system to digest it. Try to use new password on the link DeadBattery gave you.
3. Two failures, post back here and I will escalate it so a Staff can manually set it.