Hello

I fixed it by my self the version of voobly 2.7.5.6 has problem, the version 2.7.4.1 is ok

I guess you must use the required game room settings:
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And if that not help, update graphic drivers.

Thanks alot for helping I will try to do it when I have time

If the recommended game room settings do not work, simply run Windows Update and bring your computer up to date. In rare cases you have to update your drivers manually, simply download the vendor's driver utilitiy which will automatically detect and install all drivers that apply to your computer.

Thanks for your help kwin.

thank you all for trying to help me ,I appreciate it

You are welcome.