Invalid parameter issue

[scarecrow98]

I noticed there is a possible issue in line 17 that might cause some problems.
This:
curl_setopt($ch, CURLOPT_SSLVERSION, 6);

Should be this:
curl_setopt($this->ch, CURLOPT_SSLVERSION, 6);

[mattkeys]

This was causing errors on our installation and should be patched as suggested by scarecrow98