As the topic says, I'm having problems integrating Paypal into my osCommerce store. I've been able to narrow down my integration problem to the cURL request for an auth token - it returns nothing. As a result, various if/else statements take the latter branch, eventually resulting in the customer being booted back to the shopping_cart.php page without actually buying anything. I've triple-checked my API Signature credentials as entered into the osCommerce module settings, and verified that they're correctly being loaded into the params for the cURL call. I just can't understand why the auth token request fails. I can provide more information if necessary. Any help?
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