Hi looloochick,
I just checked your account, and see that your subscription has been active since July 8. You should be able to log in and convert files. What happens when you try? And, are you logging in to the service from within Reader, or directly on the ExportPDF website? If you're using Reader, please make sure that you have the most current version by choosing Help > Check for Updates. Version 11.0.07 (the current version) alleviates a sign-in error that occurs with earlier versions.
Please let us know how it goes. If you are getting an error message when you try to sign in or convert, please let us know what it is, so we can point you in the right direction for a solution.
Best,
Sara