OK, sorry I didn't explain better. You can get the IP address from the receiver. Press setup button on front of receiver. Use down arrows until it says *Setup Menu. Network. Press enter and it should change to *Network. Information. Press Enter again and now you should be able to use the...
Things to try:
Type the IP address into your web browser and you should be logged into the menu system for the receiver.
Click on VIDEO->HDMI SETUP and make sure HDMI audio out is set to AVR. You can also set Video Output to Auto here.
Go back and click on OUTPUT SETTINGS. Here I leave Video...