Stuck on Installing PHP plugin PDT on eclipse luna

Question

I'm facing a boring situation i am unable to install PDT on my eclipse luna using Downloaded zip of PDT v3.4 or the url link with the eclipse's tool Install new Software lead to the same situation even with even with version 3.3. I'm using eclipse luna x64bit, jdk8 x64 on window 8.1 x64

here is the original error

 Cannot complete the install because one or more required items could not be found.
  Software being installed: PHP Development Tools (PDT) JUnit Tests 3.3.0.201406110111 (org.eclipse.php.test.feature.group 3.3.0.201406110111)
  Missing requirement: PDT Core Unit Tests 3.3.0.201406110111 (org.eclipse.php.core.tests 3.3.0.201406110111) requires 'bundle org.eclipse.dltk.core 0.0.0' but it could not be found
  Cannot satisfy dependency:
    From: PHP Development Tools (PDT) JUnit Tests 3.3.0.201406110111 (org.eclipse.php.test.feature.group 3.3.0.201406110111)
    To: org.eclipse.php.core.tests [3.3.0.201406110111]

I don't understand what is going on because il installed PDT in a 32bit win7 machine without problem

Answer 1

I Figured out what was the problem. The problem was the ISP Network not good of firewalled . i changed to another ISP and got stuff installed!