JSON post request help

[denimen.]

Greetz,

Im having some problem with the new api and can anyone please try to help on this one..

I get the session token via global wsdl using soap.
I use the session token with the application key that I got from the betfair.

$url="https://beta-api.betfair.com/rest/v1.0/listEventTypes/";
$curl = curl_init($url);
curl_setopt($curl, CURLOPT_HEADER, true);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_HTTPHEADER,
array("X-Application: $appKey","X-Authentication: $token","content-type: application/json"));
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER,0);
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_POSTFIELDS, '{"filter":{ }}');
$file = curl_exec($curl);
curl_close($curl);

echo"<pre>"; print_r($file); 

Since I'm new to sending post request and also with the json format can anyone explain this error and maybe give me a little hint on how to move on with this.

error: {"detail":{"exceptionname":"APINGException","APING Exception":{"errorDetails":"Forbidden : DSC-0037","errorCode":"UNEXPECTED_ERROR","requestUUID" :"prdang001-02191007-000005f5f5"}},"faultcode":"Client","faultstring":" ANGX-0006"}


Thanks, Denis