How to reset graphic setting?

[yubin]

I turn on the MASS. but the screen turns to black. When i open the game again it still black, i can only hear music. how can i delete all the setting without reinstall the game? I am using pc version. my video card is Geforce 9500m GS 512MB

Thanks

[GuCcI24]

delete tha config file in tha saves folder:
C:\Documents and Settings\user name account\Application Data\2K Sports\NBA 2K9\Saves