I don't know much about JBoss IDE. However, the
Chapter 11 in the JBoss IDE document says that you have to first configure the deployment through the Window->Preferences option.
Select Window > Preferences. The workbench preferences appears.
Select JBoss-IDE > Deployer to display the defined deployment targets.
The upper area contains the file system targets build upon the debug configuration defined.
The upper area should point to the deploy folder of your JBoss. Once you have done that, you can then right click on your application (xyz.ear) and deploy it.
Disclaimer: I havent tried this. I am just going by what's been mentioned in that document