App Transport Security policy requires the use of a secure connection - IOS 9

I'm facing problem connection to API with using IP address. Even I had add the following code to plist, it still show error as below:

"http://xx3.xx.xx8.xx7/xxx/xxx/ error: The resource could not be loaded because the App Transport Security policy requires the use of a secure connection."

This is the code I add to the plist

  <key>xx3.xx.xx8.xx7</key>

     <dict>

      <key>NSThirdPartyExceptionMinimumTLSVersion</key>

     <string>TLSv1.1</string>

     <key>NSThirdPartyExceptionRequiresForwardSecrecy</key>

     <false/>          

     <key>NSThirdPartyExceptionAllowsInsecureHTTPLoads</key>

      <true/>