Your music server can't connect to the wifi router in the house but other devices can from the same physical location in the house.
Have you confirmed that the music server's wifi card is turned on? Can see your wifi network from the music server? If yes, what is the signal strength reading from the music server? What is it from the iPad, laptop, and Kindle when in the same location as the music server?
What are you using for the music server? What operating system is it running and are both the operating system and manufacturer's patches up to date?