Change mybloglog URL

I've seen this asked once, but it was a question asked under another question and it really didn't look like it was properly addressed, so I am asking.

I would like to change the url to my 'mybloglog', my current one is http://www.mybloglog.com/buzz/members... and I would like to change it to http://www.mybloglog.com/buzz/members...

Is this possible, and can i do it myself, or does it have to be done for me?

I have already changed my username, but that didn't change the 'mybloglog URL'

Thank you I hope to hear back soon, and hopefully have it changed.