i rezise(in vitrualdub) my pal DVD to

new widht: 480 (NTSC 480)
new height: 432 (360)

filter mode: precise bicubic A = 0.6

expand frame and letterbox image = yes

frame width: 480 (480)
frame height: 576 (480)

after i encoded the file to mpeg2 and mux in bbmpeg i use nero to burn it but it say's that the file is

480 X 464 not standard to pal

does anyone know's why this happens? need help