finally I managed it to implemented the point light shadow (not optimized or cleaned up^^) but was a hard peace of work. A screenshot follows at the end of this post.
So, the Unreal Engine 4 was released during the last days and I have to think about, to stay at UBE or continuous my work with Unreal Engine 4, then I can consecrate on the game itself. I will play the next few month a bit with it, and will decide then.
Of course before I will change (If I change) I will bring the UBE to a useable version.
We will see what the future will bring^^.
Screenshot (Click to enlarge):

Greetings from Germany
UnionBytes http://www.unionbytes.de/ (German)
Arthur