Word 2007 problems auto advancing bullets

Word 2007 problems auto advancing bullets

When working in a list - doesn't matter if its bulleted, numbered or multi-level - the next line of the list does not advance to the next bullet or number when I press ENTER. The next line reverts to the Normal style and I have to manually convert it to a bulleted line either by copying the format from the previous line or by clicking on the bullet/number/multilevel list buttons on the Home bar.