I just lost my first sale on my site because of an error with Paypal (I'm not saying that it's not pilot error). Here is the error:
10002 Security error - Security header is not valid
I went into the API information for our paypal account and verified that I have the right info in the name, password, and signature fields.
I know that this has probably been discussed over and over but because I need my site to be able to process orders I am putting in the question first then I will go searching
Thanks in advance for any help.





that's what I get for not reading the whole thread

