Doug thanks very much for your help.
I just downloaded the 8100 simulator to go along with the 4.1.4 MDS that I downloaded last night, and it works just fine. I will try to find that 4.3 JDE to go along with the 9630 simulator. I googled for it earlier but the blackberry site links were all dead. I will find it eventually. The MDS 4.1.4 link was on a developer tools page and not in the dropdown list of simulator downloads :P
Thanks again for your help.