Hi, I'm trying to set up a credit card gateway in Express Invoice. I've got my API signature credentials and all that, but it also asks for a Gateway URL. This is what the Express Invoice website says: Setting up a PayPal Credit Card Gateway 1. They should have an PayPal account. 2. PayPal gateway URLs: Sandbox URL: https://api-3t.sandbox.paypal.com/nvp Live URL: https://api-3t.paypal.com/nvp Then on the same window from credit card gateways click "check for updates" to download a .dll then click PayPal tick box then click options to access PayPal account Settings window on where you can enter the API password , username,gateway URL. I do all this, but it keeps saying "This credit card gateway is not properly configured". Any ideas?
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