hi, i am new to here,and i come from china,this website is reallly cool.and i can share many promotion news to everyone!

i've stay 40 nights this year till sep,2008,I mail MARRIOTTREWARDS SERVICE CENTRE,i get fast upgrade into platinum status from gold.
it's first time to been platinum(By 18nights at last 3 months)

when i sign my account, i see platinum is valid to feb 2009,five months left,it's hardly to reach the left 35nights.

been upgarde into marriott platinum,now i wanna ask for help.
HOW TO maintain IT All 2009?
any one have try for that?thank you!please post your experience？

the questions is:
If i first got Gold promotion until feb 2010 and then earned Plat via challenge at sep 2008

my platinum will vaild to when?

and i get 75nights during 2008-2009(at any rolling 12 months tatal)
i can be platinum continum,and vaild to when?feb 2010 or feb,2011?