samsung b3410 wallpaper problem?

[Cal]

i have purchased a samsung b3410 mobile and have had it for some time, i am having a problem though, because the wallpaper on my background is different to what the wallpaper looks like when i lock my phone, i have tried all the settings but i cant seem to find anything which will turn off these default pictures which are on the background when the screen is locked. please help :\