Please let us know in note section if you are still able to reproduce this issue in latest Development build.
If so, please send us dxdiag and files from this folder: "C:\Users\<Name>\AppData\Local\DayZ\"
Can you pack the files in winrar and upload it somewhere?
When the *.rar will be smaller than 5.000KB, you can attach it here.
For future reporting please refer to "How to guide" http://feedback.dayzgame.com/how-to-user.html
Thank you.