ESP8266+UNO can't get connection to WIFI AP

hello everyone,I'm a Arduino beginner in Taiwan,and i got a problem...
here is my AT Command:

AT

OK
AT+RST

OK
H!�1�
JLH薹H�
峉~�.���
Ai-Thinker Technology Co.,Ltd.

ready
AT+GMR

AT version:0.40.0.0(Aug 8 2015 14:45:58)
SDK version:1.3.0
Ai-Thinker Technology Co.,Ltd.
Build:1.3.0.2 Sep 11 2015 11:48:04
OK
AT+CWMODE=3

OK
AT+CWLAP

+CWLAP:(4,"TP-LINK_088",-82,"90:f6:52:c5:e0:44",1,-66)
+CWLAP:(4,"Jalimac",-81,"c4:a8:1d:8b:9a:4c",2,-49)
+CWLAP:(0,"CHT Wi-Fi Auto",-75,"6c:19:8f:af:e1:10",4,-46)
+CWLAP:(0,"TPE-Free_CHT",-75,"6c:19:8f:af:e1:17",4,-46)
+CWLAP:(0,"CHT Wi-Fi(HiNet)",-76,"6c:19:8f:af:e1:11",4,-46)
+CWLAP:(3,"QQmouse",-37,"04:8d:38:a4:d8:47",9,-29)
+CWLAP:(2,"wu",-93,"90:94:e4:08:2d:ab",6,-42)
+CWLAP:(2,"ADSL",-80,"00:18:e7:cb:62:ca",6,-59)
+CWLAP:(0,"",-88,"8e:4d:ea:04:67:9d",8,-131)
+CWLAP:(3,"ShenYiXuan",-91,"6c:19:8f:ca:14:4c",10,-47)
+CWLAP:(3,"TES-Public",-88,"2c:e6:cc:3f:c1:48",11,-67)
+CWLAP:(3,"TES-Intranet",-89,"2c:e6:cc:7f:c1:48",11,-67)
+CWLAP:(1,"tom",-79,"f8:d1:11:a0:b1:ba",11,-62)
+CWLAP:(3,"TES-Public",-81,"2c:e6:cc:2d:40:f8",11,-56)
+CWLAP:(3,"TES-Intranet",-81,"2c:e6:cc:6d:40:f8",11,-57)

OK
AT+CWJAP="QQmouse","mypassword"

+CWJAP:1

FAIL

does anyone have any idea about why i got a FAIL?
thank you very much