Unity build.exe for cv1 not work.

Hi guys.
I already used unity builded files in cv1 without any problem.
but from yesterday a strange problem found.
none of my builded unity files.exe not work in VR mode.
1) I turned On the "Unknown Source" already but not work.
2) I checked the _data folder that has the "OvrPlugins.dll" file.
3) in my builded files "Virtual reality support" enabled.

Are there anything new that I must know??
Please help.

Thanks for support