"No GPU available to the iray render" Nvidia Quadr

Hello,

I just downloaded Visualize because I wanted to improve rendering speeds using my GPU but when I started rendering I noticed that the times were the sames as the ones on Photoview.

I tried selecting manually rendering with the GPU and not hybrid but I got a message saying: "An internal error occurred. Please see log file for details". After checking log files this is what I found:

[81.6] IRT:RENDER	1.0 IRT rend info : Resource assignment for host 0 has changed.
[81.6] IRAY:RENDER	1.0 IRAY rend warn : GPU 1 (Quadro P4000) with CUDA compute capability 6.1 cannot be used by iray.
[81.6] IRAY:RENDER	1.0 IRAY rend warn : There is no GPU available to the iray renderer.
[84.8] API:DATABASE	1.0 API db warn : Transaction is released without being committed or aborted. Automatically aborting.
[84.8] IRAY:RENDER	1.0 IRAY rend info : Device statistics:
[84.8] IRAY:RENDER	1.0 IRAY rend info : CPU:	44 iterations, 0.049s init, 27.221s render
[84.9] IRT:RENDER	1.0 IRT rend info : Creating irt render context (cache id: 0x0000000100000001).
[84.9] IRT:RENDER	1.0 IRT rend warn : CUDA Device 0 - "Quadro P4000" was already initialized
[84.9] IRT:RENDER	1.0 IRT rend info : Iray interactive running with 1 device:
[84.9] IRT:RENDER	1.0 IRT rend info : CUDA device 0: "Quadro P4000" (compute capability 6.1, memory 6464 MB/8192 MB)
[84.9] IRT:RENDER	1.0 IRT rend info : Driver version: 377.11
[84.9] IRT:RENDER	1.0 IRT rend info : -------------------------------------------------
[84.9] IRT:RENDER	1.0 IRT rend error: failed to estimate required local memory per kernel launch
[84.9] IRT:RENDER	1.0 IRT rend info : Using backplate texture "softbox_texture_108".
[84.9] IRT:RENDER	1.0 IRT rend info : Disabling instancing.
[85.0] IRT:RENDER	1.0 IRT rend info : Scene update took 0.038614 seconds.
[85.0] IRT:RENDER	1.0 IRT rend info : 1.6% of radiant power of environment in 0.2% of the solid angle.
[85.7] IRT:RENDER	1.0 IRT rend info : Creating multiscale environment representation of resolution 2048x1024 took 0.765197s
[85.7] IRT:RENDER	1.0 IRT rend info : Progressive buffer resolution 261x147 (size: 147, offset: 0, stride: 2, block_size 2)
[85.8] IRT:RENDER	1.5 IRT rend error: failed to load: device kernel image is invalid
[85.8] IRT:RENDER	1.5 IRT rend error: Kernel linking failed
[85.8] IRT:RENDER	1.0 IRT rend warn : A device failed during rendering
[85.8] IRT:RENDER	1.0 IRT rend error: Cannot render: device failed.
[85.8] IRT:RENDER	1.0 IRT rend error: Failed on first frame. Dropping failing devices and re-rendering
[85.8] IRT:RENDER	1.0 IRT rend warn : All devices disabled.
[85.8] IRT:RENDER	1.0 IRT rend warn : There are no devices that can be used with IRT (Compute Capability 2.0 required)
[85.8] IRT:RENDER	1.0 IRT rend info : -------------------------------------------------
[85.8] IRT:RENDER	1.0 IRT rend error: Cannot render. No devices activated.
[85.8] IRT:RENDER	1.0 IRT rend error: No devices activated. Enabling cpu fallback
[85.8] IRT:RENDER	1.0 IRT rend warn : All devices disabled.
[85.8] IRT:RENDER	1.0 IRT rend warn : There are no devices that can be used with IRT (Compute Capability 2.0 required)
[85.8] IRT:RENDER	1.0 IRT rend info : -------------------------------------------------
[85.8] IRT:RENDER	1.0 IRT rend error: Cannot render. No devices activated.

I have the latest drivers from Nvidia and I checked as well that there were no SW processes running on the task manager.

I don't know what else to do, what else can I do?

Thanks!