Can't get into recovery mode on samsung GT-19000

Tried all kinds of different combinations, nothing works it just boots normally or keeps repeating the first menu screen. up+home+power etc.. atleast 10 different combinations..

I CANNOT do other alternative methods because i am trying to wipe the phone for my sister since she doesn't remember her gmail account and thus the pattern lock is locked and its asking for gmail.

Thanks in advance if you can help.