The application Home screen (process com.sonyericsson.homescreen) has stopped unexpectedly. Please t

I got this error; "the application home screen(process com.sonyericsson.home screen) has stopped unexpectedly. please try again" and i get the option to force close it. but even when i restart my phone same error is seen. i cannot access my menu so i cannot uninstall or do anything. please help. my phone is sonyericsson xperia x10 mini