Security Header is Not Valid

I was reading this and am receiving the same error. I have verified that the account information is correct (using os_paypal_pro) with the correct API Username, Password, and Signature.

So I tried disabling the PRO and went with test mode in the os_paypal and this worked. Is there any way to run test mode with the API or do I have to into the PayPal account and set it to test mode to verify that it is working?

Is there anywhere else I should be looking to solve this error?

Hi toad78

I think only PayPal knows the answer for this question. In our case, when we test PayPal Pro, we use the testing information and it works. So if you want to try PayPal Pro in test mode, maybe you should try to use data of our test account:

Username:
thucdam84-facilitator_api1.yahoo.com
Password:
1385573676
Signature:
AxiDEQyO6PmBTOAayKexBJF7fyPjA85haEfLNDRfrWzfMGgIPZn0e-Rn

Regards,

Tuan