Hello, it seems I cant login to your app using my ebay login. It worked so far. I tried it today and it wont let me in. I dont know why? Thanks

Not sure which "app" you are referring to.
If you use Windows application, make sure you did not block in your Firewall. You can check the following forum thread for more information:
http://www.myibidder.com/forums/viewtopic/668/password-or-connection-error-message-when-login/

If you use the Web-based interface, please make sure you are putting your current eBay user id and password.
If that still does not work, please let me know your eBay user id (no password please) so I can check.