Not able to create AccessToken using cURL

[#1]

I get the error highlighted below. I did try several combinations. Did anyone come across this?

C:>curl -X POST -H "Content-Type: application/x-www-form-urlencod
ed" https://myname-test.apigee.net/oauth/client_credential/accesstoken?grant_
type=client_credentials -d 'client_id=rcZ4qQ3EUqYRbGB6F&client_se
cret=9RJLkBte'
curl: (35) error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol
'client_secret' is not recognized as an internal or external command,
operable program or batch file.