Thread: wordpress account problem

When I saw a interesting worldpress blog, I want to comment, but when I login with my account, it shows invalide useername. What's the matter?

When registering to a blog to leave a comment or normally participate, you are requested to select and enter a User name and a Password.

If the registration process comes back with an error message, no matter how it may be worded, most of the time it is telling you that the name you chose is already in use by another registered User OR that it does not follow formatting as required (capitals, numbers, too many/too few characters, etc.). Choose another.