Optix denoiser don't work

[Pixelpark]

I've just installed Vray Next Gpu 4.30. Everything work fine except the Optix denoiser when I render in IPR mode. It doesn't work at all and the report window gives me the message " [VUtils::Context Impl::init] OptiX failed to initialize. Error code : 7801" (see also the attached image).
Any solution? Could it be a problem due to the driver version of the graphic card? With the previous version of Vray, Optix denoiser worked fine.
Max 2018, Nvidia GeForce GTX 1070.
Thanks!

[hermit.crab]

It's possible that you're using an outdated GPU driver, the currently recommended driver version is 441.20. Try updating and see if that fixes the issue.

[Pixelpark]

Thanks Aleksandar! I updated the graphic driver to the most recent release, and now everything works.
Cheers