This is not something we can help with - sorry.
Although the site is based on our software it is completely out of our control. We don't even know who the site owner might be.
If you are a member of this site and no longer want to be, then you need to contact the site admin and ask to be removed. With the version of Jamroom that site is running I don't think its possible to 'self remove'.
Hi - Welcome to Jamroom
Not really sure what you are asking though. Is http://www.musicfast.com your Jamroom4 site? If so you can login as admin and delete a profile.
Or are you just a member of that site? If so you'll need to contact the site admin, maybe though its contact page - http://www.musicfast.com/pages/contact
Hope that helps