I'm not real familiar with Musiccast but I'm assuming you use it to stream music from your PC/internet to your home stereo...? Does it have it's own network ID and password? Try this, disable Musiccast, just power it down so that when the router looks for available networks it's no where to be found. Hit the reset button on the back of the wireless network router and reconfigure from the default settings. It wouldn't be very smart to run your network with the WEP encryption turned off so set that up too. See if that works better. You may have to setup Musiccast(if it's possible) with the same network ID and password as the wireless network so it's just like another PC connecting to the router. Do you see where I'm going or am I totally off the track?