Table not gettin updated

Question

hi,
m developing an application using vb 2005 and MS Sql server 2005. At run time the application shows records being added but after closin the application when i view the table no updates have been made...

can u help me out..the same problem occured wid a teachers project i downloaded for reference which comes wid sql server 2005 sample download..the application(both of them) run widout error makin no permanent change in table...