Cannot get an ATC to run using Adapter Manager

We are trying to get a 4.1 ATC to run using Adapter
Manager. It has been running for a couple of years using
the Adapter Config tool, and we would like to convert to
using Adapter Manger. We have installed AM sp1 already.
The ATC saves just fine, but when we enable it, AM said it
was starting the adapter, and then said it was stopping it
and would retry again in 2 minutes. No other error message.
Any hints about how to make this happen would be greatly
appreciated. Thanks.