Renew Token Not Working

[jaydeepsiplnet]

Hi Team

Unable to get access token from renewtoken function.

It is alway return me

{"error":"invalid_request"}

Request
POST / https://secure.myob.com/oauth2/v1/authorize/

client_id=d777839f2f7-0ef5-47ab-9946-b2e694363192&client_secret=E3bymLRGH25887S4SmQV8258g3fgiU4&refresh_token=bq7R!IAAAAPTFVGdjX_SkUFh2YHkO_Q6t4yLW0_1nSievq6uMm9CXwQAAAAGo8Oh1k0cEc10RKHfNgMHBAgD9w1yCmUBWUP6oIiZo65Q1G5hJLOdrVv5sGP19moEg5xyH0afMI4UPcGtpuky10lxGVL4CFcvdnLKrPDLNiTcVolcmh3JX-hZ&grant_type=refresh_token

Where is the issue