because the api documentations tells me . authenticate by encoding your username and password to Base64 HTTP Basic Authorization

#                                     | space
#                                     V
$req->header('Authorization' => "Basic " .encode_base64('cv23gwyzqvur:
+t
+y7idfphrkl'));
[download]

poj

and i think the problem is with host i will either contact them. coz i have tried other host api and worked