In order to bid with SchnapperPlus or SchnapperPro you have to deposit you eBay user data in the program.
If you change your username or password in eBay you also have to make these changes in your Schnapper program.
To exclude typing error while depositing your data you should test the logging in immediately afterwards. In the user data form in the options you can find the accordant button.
You can also bring about the logging in by clicking the Ctrl+F4 keys.