when i click on ''preview'' , this message appears ''Form not found , this form is disabled

The form you provided was created under a guest account, but you have the same form in your account, both forms are asking for a password and this is why your form is disabled, here is the field where you're asking for a password: 

I have removed that field from your form in order to activate it and activate your account as well, asking for information like login credentials, CC information is critical and it is not allowed at JotForm, if you keep asking for this info your account can be permanently disabled, this is also stated in our terms: http://www.jotform.com/terms/