OK, I'm getting this message at the moment and I can't fix it:
We're sorry, but we were unable to process your payment.
The cURL library, which is required by the PayPal Website Payments Pro module, is not present. Please contact your webhost and request that it be installed.
If I look at the server info in the administration panel, it says:
curl
CURL support enabled
CURL Information libcurl/7.16.0 OpenSSL/0.9.8a zlib/1.2.3
Which to me suggests that it is working?
Using IIS on Win2k...