[操作疑難] 求救""昨日買的TL-WN821N無線手指 不能連線上網

昨日買了一個ROUTER: TL-WR841N,一個無線手指TL-WN821N
ROUTER用到,插線電腦上到網,用IPHONE都用到WIFI,
但無線手指TL-WN821N連不到上網,dirver已裝了,求救!!!!!!!!