I have issues with Streaming via WiFi from my Buffalo NAS to Philips LCD Model 47PFL9664H/12

It intermittently stops streaming media and cannot see the NAS the only way to fix is to restart TV and start from the beginning.

When i lose the Streaming and check with settings on the TV it shows all ok and can use NET TV.

I have no problems when connected via Cable(RJ45) or when streaming to my Xbox 360, PC's or Laptops via WiFi.

Have logged and spoken to Philips who could not resolve.

I have the latest Firmware Version: dated 15.7.2010.

Anyone seen this or any advice.