Ticker Not Filling Specified Region

I am working on Version 1.6.0-rc1 and have create a background template for my screen. I created a region 1,000 px x 750 px in size, added Ticker, using news feed from BBC. However when I review on Client the Ticker feed is restricted to top left hand corner of region, no matter what I attempt to do it will not display correctly. Thanks in advance for any assistance.