Site into aspx c sharp login admin wrong. You able to fix this? what is the problem? Realized into visual studio 2010.

Site into aspx c sharp login admin wrong. You able to fix this? what is the problem? Realized into visual studio 2010. Database is into sdf single file. Sql compact 4 file database.sdf. you know this microsoft database?
home page estrazioni-del-lotto.it/default.aspx
admin estrazioni-del-lotto.it/login.aspx but i insert correct user and password but are wrong.
What is the problem?
Is possibile solved?