M9 and V110 steps work, still gives errors

[Eckel]

I've just installed M9 and v110 of the plugin. I can right-click on the project and enable the "Add Java 1.5 Support," which then goes gray to show that it's enabled. However, even if I recompile using "Re-Compile JDK 1.5 Sources" I still get all the errors from JDK 1.5. For example,

import static com.bruceeckel.Tools.*;

Flags a problem with the static import, and on and on for all JDK 1.5 features.

Thanks for any help.