codeigniter 3 - Why does Code Igniter file upload tutorial not work? -

i doing code igniter file upload demo doesn't work. when try upload file following error message:

the following error encountered while trying retrieve url: http://[::1]/ul_ex/index.php/upload/do_upload system returned: (111) connection refused 

clearly there's problem path don't understand going wrong. copied , pasted code make sure wasn't typo still doesn't work!

do need update routes?

thanks in advance

ok, overlooked pretty simple thing didn't set base path in config file. set project test uploading forgot this. no problems now!