Well, Ginny, let's prove your OM wrong! Well, at least partially ....
I've never used one - so the first place I would start would be by reading the owner's manual. But, let me guess - your Mom didn't give you the manual? Second idea would be to call your Mom and ask her about how to use it.
If you need to get a replacement manual - The Bread Beckers site
has them. And, they also have a forum ... and one of the areas is devoted to questions about the DLX/Assistant - so manybe you can get an answer from someone who actually owns and uses one of these things?
From what I read in the DLX Assistant thread - the roller is for kneading dough, and unless it is free to travel to the center of the bowl it will push ingredients up and out of the bowl. Looking at the attachments that come with it - maybe the beater assembly would have been a better choice???
Anyway - maybe that's enough to help you get a de facto answer and dispel the OM's myth that you can't get any help from the internet.