I'm having trouble adding JBoss EJB 3 libraries to an existing project.

I have downloaded a fresh version of Eclipse 3.5.2, and successfully used the built in "Install" wizard to download and install JBossTools 3.1.0GA. For the sake of troubleshooting, I have created a brand-new Java Project in the IDE. I have also sucessfully created three different Servers, one each for installations of JBoss 4.2.2, JBoss 5.1, and JBoss 6.0M2 that I am currently working with.

So I go ahead and enter the project Properties, select "Java Build Path", and then go to the "Libraries" tab. I click on the "Add Library..." button, select "JBoss EJB3 Libraries", then "Next...", select any one of the declared Servers, and hit "Finish", which brings up the following error:

"The selected configuration <JBoss server> does not contain the expected EJB3 libraries. Please install JBoss with EJB3 enabled, or try another configuration."

I get this error regardless of which server I have selected. Using an existing EJB3 project, I have also verified that EJB3 is indeed installed and working properly across all 3 servers.