FTB Ultimate not downloading console

[habs_2001]

FTB Ultimate wont download on my computer for some reason. when i try to download it, this error message appears:
From Console: com.mojang.authlib.exceptions.InvalidCredentialsException: Invalid credentials. Invalid username or password.
From Console: at com.mojang.authlib.yggdrasil.YggdrasilAuthenticationService.makeRequest(YggdrasilAuthenticationService.java:50)
From Console: at com.mojang.authlib.yggdrasil.YggdrasilUserAuthentication.logInWithPassword(YggdrasilUserAuthentication.java:72)
From Console: at com.mojang.authlib.yggdrasil.YggdrasilUserAuthentication.logIn(YggdrasilUserAuthentication.java:55)
From Console: at net.ftb.workers.AuthlibHelper.authenticateWithAuthlib(AuthlibHelper.java:24)
From Console: at net.ftb.workers.LoginWorker.doInBackground(LoginWorker.java:48)
From Console: at net.ftb.workers.LoginWorker.doInBackground(LoginWorker.java:33)
From Console: at javax.swing.SwingWorker$1.call(Unknown Source)
From Console: at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
From Console: at java.util.concurrent.FutureTask.run(Unknown Source)
From Console: at javax.swing.SwingWorker.run(Unknown Source)
From Console: at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
From Console: at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
From Console: at java.lang.Thread.run(Unknown Source)
It does this with every mod pack.

 

[UniZero]

Check your username and password.