You're player's wifi interface or antenna might be broken, or there might be no signal where it's located. Thick walls and metal shelving often cause the wireless signal to be severely attenuated. If you have a wireless laptop, you might try placing it in the same location to see if it has problems connecting.
However, wifi problems are why hard-wired connections usually are recommended on AVS -- either ethernet or power-line networking. Real-time audio and video (like when you're listening to music or watching a video) are particularly sensitive to signal dropouts, which are quite common when using wifi's wireless connections.
Marantz SR7009+MM9000/Atmos 7.1.4 (FH+TM:DefTech PM1000)/LCR+TM amped