I don't suppose you'd like to edit your display name to be a little more informative? Technically, I suppose you conform to our naming requirements, but a name as terse as "k dey" is a bit cryptic, and we prefer to feel like we're dealing with real people. We don't charge by the letter.
Anyway, there is an
Ant plugin that comes with the
Java developer versions of Eclipse, so you shouldn't be seeing this message unless either your copy of Eclipse is damaged or it isn't one that includes the Java developer plugins.
I have Android development installed. I'm using a copy of the Europa distribution of Eclipse v3.3. The actual Ant plugin is for Ant 2.7, but there was no problem.