Stuck on connecting to wifi

Hi all,

I'm trying to connect to my home wifi using UNO (Infiduino R3) and CC3000 Wifi Shiled.
All I did until now is to plug the WiFi shield on top of the UNO and run the sketch "WebClient" from Adafruit_CC3000_Library

In the sketch I set up WLAN_SSID, WLAN_PASS and WLAN_SECURITY as needed

when I upload the sketch, I stuck at the "Attempting to connect to my_network_SSID", it doesn't fail and doesn't succeed, it just stuck.

I can see my network when printing SSID list, but just cant connect.

Hello, CC3000!

Free RAM: 1066

Initializing...
Networks found: 1
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SSID Name    :my_network_SSID
RSSI         : 83
Security Mode: 1

================================================

Attempting to connect to my_network_SSID