Not even probably. Radioshack knows little of scanning and scanners, despite the fact that they sell them. Whenever I go to Radioshack with my scanner on me, many of THEM will ask ME questions. I once had an employee ask me if what I had was a police scanner!
To answer your question on your old scanner, it probably stopped working when Waukesha went through rebanding (I think that was 2 years ago). They moved down from 856 MHz area (I think) to 851 MHz.
Moral of the story: just because they sold it to you, doesn't mean they know anything about it