Hi sahelakhalid,
Please click link
http://community.thingspeak.com/forum/thingspeak-api/sending-data-to-thingspeak-problem/#p3886
and see if it is of some help, note my firmware is older than yours
OK at the end of ESP8266 means the RS232 comms worked well not necessarily the internet part
with my firmware:
AT+CWMODE?
+CWMODE:3 3 : softAP + station mode
OK
------------------------------------------
AT+CIPMODE?
+CIPMODE:0 0 : normal mode
OK
------------------------------------------
AT+CIPMUX?
+CIPMUX:0 0 : single connection
OK
------------------------------------------
AT+CIPSTATUS
STATUS:2 2 : ESP8266 station connected to an AP and has obtained IP
OK
so I asked how the things are in ESP8266 territory before ask to connect some webserver and demand "this"
Also note I think you are connected to your "wifi router" (CWJAP thing)
Good luck 