codeigniter - $config['uri_protocol'] = 'QUERY_STRING'; Not allowing AJAX -

I created some Ajax code, was working perfectly, but when I changed

  $ config ['Uri_protocol'] = 'auto'; In  

  $ config ['uri_protocol'] = 'QUERY_STRING';  

Does it work now? Can anyone provide any suggestions?

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There are comments about the URI protocol.

  / * | ----------- --------------------------------------- ----------- ------------- | URI Protocol | ----------------------------------------------- --- ------------------------ | | This item determines which server should be used to retrieve the global URI string, the default setting of 'Auto' work for most servers. If your links do not work, try one of the other delicious flavors: | | Auto Detects - Auto Detects. Pathhynpho uses 'Pathhambo' 'QUERY_STRING' usage QUERY_STRING | REQUEST_URI uses 'REQUEST_URI' | Use of 'ORIG_PATH_INFO' ORIG_PATH_INFO | * /