I found it.

It is not enough to import the Jar file - you must also hit File->Save.

On Fri, Nov 25, 2011 at 1:37 PM, Ronald Albury <ronalbury@gmail.com> wrote:
Newbie issue:
I created a package, com.scs.test
I added a model to that package (a java Jar file with POJOs in it).  The jar contains com.scs.test.Message and com.scs.test.Person.
I edited the package's "Configuration: Imported Types" to include the two objects from the model (com.scs.test.Message and com.scs.test.Person).

I go to the package assets and open a business rule.  When I click on the plus sign across from When I get the message "Note: No model has been defined.  Tip: you will want to import or define a model for this user interface to work !".  

I thought I had imported a model.  When I look at the package assets, the model is listed right there.  The objects are listed as "Imported Types". 

What am I doing wrong?

Thanks