The last few weeks i'm trying to install ideal lite 1.4 on my website.
See the link for the exact version.
osCommerce: First order than payment (eg. Dutch iDealLite)

The installation went fine, but the test payments did not. The ideal logo appears as an payment option, but when i want to move to the next step to pay my product, it stays on the same page. It simply won't go from chechout_payment.php to checkout_process.php.
When i paste the correct link in the navigation bar, the checkout_process.php page will appear and i can do my payment. Of course this isn't the correct way to do it. So if i want to follow the correct steps in the payment process it won't get any further.
Do you have any ideas what could be the problem??