Y wont da graphics stay on medium?

[Eastwood]

ok well first off i just installed da sims 2 on my new pc n when i started up da game n playd da graphics were set as low as default so i was like ok i ratha play on medium so lemme c if it works. i switchd da graphics 2 medium n they workd fine. da problem here is every time i exit outta da sims 2 n start it up again 2 play da graphics go back 2 low. i dont kno y they wont stay as medium becuz i hit apply changes afta i switch em. this isnt a big deal jus annoyin havin 2 constantly switch da settins.