“Open Type” command does not respond in Eclipse workspace

As described in this question I could not open Open Type in Eclipse via Ctrl+开发者_如何学运维Shift+T.

The clue is: When I go to Preferences -> Keys and delete the shortcut, I'm not able to re-add it with Ctrl+Shift+T. Every other combination works, but when I press T, the box gets empty.

I use KDE 4.7.1

I've found the problem: In some views some command groups are disabled. (Probably by another plugin)

Solution: Go to Window -> Customize Perspektive -> Command Groups Availability and make shure to enable "Java Navigation".

Check your systems keyboard shortcut. There should be a same shortcut which listen to your shortcut in the first place.