Checkstyle plugin to Eclipse

I am using Java 1.5, Eclipse 3.1, Ant 1.6.2 and the Eclipse checkstyle
plugin ( Has got everything to work
with Java 1.5 except the checkstyle plugin to Eclipse. I am running Ant
with Checkstyle downloaded from
>>From what I have understood, all that is needed is included in the
Checkstyle plugin, but that is how I am running it anyways at the
moment. Ant and checkstyle handles Java 1.5 stuff correctly, but the
checkstyle problems are not handled correctly in Eclipse (when I use an
enum for example, I get an error and checkstyle does not detect other

What I have done is the following:
* Shut down Eclipse.
* Removed the old Checkstyle plugin from the plugins directory in the
Eclipse installation.
* Copied the new Checkstyle plugin to the plugins directory in the
Eclipse installation.
* Started Eclipse.

Do I need to do anything else? Do I have to change any check
configurations or is all of that handled in the Sun checks that are
used automatically?

Thank you in advance for any tips!