cURL double posting

[soop]

Hey Everyone,

I am using cURL to process NETeller payments. Everything works fine however on NETellers' end, double payments are being made. I am not sure if curl is somehow double posting or not. Has anyone experienced this issue?

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_TIMEOUT, 50);
curl_setopt ($ch, CURLOPT_POSTFIELDS, $param);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);

$xml_results = curl_exec($ch);

Mysql 4.1.16 , Apache/2.0.54 and PHP5
thanks!