Acquisition Issues with GigE Camera

I'm trying to acquire signal from a STC-SC133POEHS GigE Camera from Omron Sentortech. The camera data are 1280 x 966 bayer RG8 - 40 fps.

I was unable to grab images using the IMAQ-SX driver. I used the Video Acquisition function and tried only to acquire and visualize images without any elaboration. THe camera work properly under NI-MAX configurator but shows sistematic timeout error -1074360293 if used in running VI. 

I tried to change several configuration parameters but the timeout alway occurs.

Thaks for help.

PAOLO CASTELLI