Because the complete setup is Sbrio9636 -> USB to eth1 adapter -> Myrio 1900 -> WiFi modem -> Internet. So i think there is a problem to make the MyRio eth1 and WiFi together, i tried to set the IP of MyRio eth1 to "link local only", and tried to change the IP and subnet mask but it looks they still dont' work together.
For clarity: eth1 is the "USB Host" the Type A USB, and i used a USB to eth adapter. It's not the Type B USB, which is called "USB Device" and it's for configuring only.
Thanks a lot for all your answers.