#1311 alt tab problem when connected from windows7 x64 to windows 8.1 x64

[Miltiadis]

I am connected from windows7 x64 tight vnc client 2.7.10 to windows 8.1 x64 tight vnc server 2.7.10 in full screen
when i press alt tab to swap windows inside the server environment it behaves like i press only alt.
At tight vnc server 2.7.10 website the project maintainers say that it works, but at this case it does not.