I had the same issues with the unpatched version, but here's some advice you can use for every game which is not working properly (atleast it's worth a try, helped me with the Eric fight).
Im using Windows 8 64 Bit; So I used the compatiblity mode for windows 7, you can also use XP; Run the game as admin aswell.
To be able to do so just rightclick on the KB shortcut and hit "Properties" and go to "Compatibility". (My Windows isn't english, so apologize for spelling mistakes).
Use the drop-down menu to select Windows XP / 7 and tick the box to "Always run it as admin".
There's also a thread floating around with a lot of fixes in the .lua files. So, if the above isn't helping, just take a look there.
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