I am trying to Install the SDK Platform tools within my SDK manager in Eclipse.
The versions of Eclipse, SDK and ADT I am using are:
Eclipse Luna
SDK version 21.0.0
ADT version 21.0.0
Note: I am purposely using older versions as they are compatible with a plugin tool I wish to use.
When I open SDK manager and try to install the SDK platform tools, the Manager states that they have been installed but this is not the case. If SDK manager is shut and re-opened the tools have not been installed.
Why is this the case? How can I install them?
Screen shot of SDK Manager:

Just switch to Android Studio. The android bundle for eclipse is dead. I've switched to Android Studio about 3 months ago and it's way much better.