wiseallec's dashboard

You don't need the curl_setopt($ch, CURLOPT_POST, true);

curl_setopt($ch, CURLOPT_POSTFIELDS, $post_params); should be enough. I had what you had as well, and was having the same problems you were having, but removed it and it started to work. Hope this helps.

also, you might want to place the api_key, the ts, and the hash in the postfields as well.