See: s2Member -> PayPal Options -> Account Details
If we did the install for you, please make sure that you disable "Sandbox Mode" after entering your own live account details. Whenever we do a professional installation, we do all testing with a Sandbox account, and s2Member is placed into Sandbox mode during that testing sequence. If you enter your own live account details, but s2Member is still attempting connections to a Sandbox endpoint, this can happen.
See: s2Member -> PayPal Options -> Account Details -> Sanbox TestingStatistics: Posted by Jason Caldwell — July 7th, 2010, 4:17 pm
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