Did you perhaps intend to send this to gentoo-user-de?  People here usually
write in English.

Regarding the problem: I suspect you haven't unmasked the version from the
"seden" overlay correctly (for example, you might need to add an entry to
package.accept_keywords).  More information on available versions and their
masking status would be useful (e.g., the output of "eix -l eclipse-sdk", in
case you you have eix installed).

(Also, 11 unread news items is... a lot.)

-- 
Marc Joliet
--
"People who think they know everything really annoy those of us who know we
don't" - Bjarne Stroustrup