Menu Bar creating second line

Hello,

I am trying to add another Menu system to the navigation section of our website – currently if I add this new menu system the site drops it down to a second level and creates a rather nasty huge blue bar at the top of the site.

I was wondering is there anyway I can stop this happening ? There seems to be plenty of space if the menu system shunted to the left instead of it all going off to the right.

Thanks for any help,

Jonny