Follow this list to try and fix login problems to Flirt when using Flirt.
Login to Flirt from a web browser, such as Safari or Firefox.
This will verify that your login and password are still working.
Also, sometimes your account can be suspended and you will need to follow Facebook's instructions to un-suspended it. When your account is suspended a warning message will be displayed on the home page of your account.
Try re-creating your account. Open the Accounts preferences and remove the account and then Login again.