Recently changed my twitter handle, and I can't figure out how to change it on Wordpress.?

[Victoria]

Posts will automatically go to my twitter feed, but I want to change the "via" to my current twitter handle. I have no idea how to fix it.
I have done this before, and also did this again following the suggestion of Windowphobe below.....

I did "go to Settings/Sharing, delete the old username, refresh the page, press the Connect button and enter the new username."

And still it says "via...." with my old username.

Weird, right?

[Windowphobe]

Go to Settings/Sharing, delete the old username, refresh the page, press the Connect button and enter the new username.