Problem with Bootcamp

Hey, so i have the latest version of bootcamp installed and everything as far as functionality is fine I just can't get rid of it. I've ran through the boot camp assistant instructing it to merge the partitions back into one it just won't do it it runs through says it has completed and has to restart but when it does the Vista HD icon is still there. Can anyone help. Thanks very much.

Also if its anyhelp I have a MacBook

 

I have no idea why but i ran bootcamp assistant again and it worked this time.