Thanks. I had lost this thread a long time. I did manage to use the Sandbox for a while ane it worked great. But now that I've actually made the site live, I found this thread again... I did what you said here and triple checked all the files, and I can't find spaces, or wrong credentials, however I still can't get through error: 10002ErrorSecurity header is not valid2c122d2ebb3562012.
I opened another thread so this one is not necessary.