Hi,
First I configure a subscription without trial period. It works perfectly.
Then, I'll try with trial billing amount (22.5 € and 45€ for the reccurring billing amount).
Here is the strange thing. Sometimes it's work, sometime, it doesn't.
When it doesn't work, there is this message into ipn_handle_debug.log :
FAILURE :Wrong Product Price Detected! Actual Product Price : 45 Amount Paid: 22.50
FAILURE :IPN product validation failed.
Despite this error, the member account that the customer purchased is still created. The problem is that the commission of the affiliate who brought the customer through his link, is not credited.