According to the datasheet, 0x3FB2 should get you: Brown-out Reset disabled, Code protect disabled, Power-up timer enabled, Watchdog Timer disabled, HS oscillator.
What do you mean by "but didn't get that value"? Did you try reading it back from within MPLAB using a debugger of some sort?
How are you trying to set your configuration bits? You can have MPLAB handle them or you can have MPLAB generate source code for them which you then embed in your program.
Have you debugged your circuit to make sure everything works as expected? You should post your circuit here so we can identify any potential issues.
Are you positive your source code is correct the point that it properly sets up the PIC and flashes an LED? Have you run it through the MPLAB simulator to see if it's working correctly? You should post your source code here so we can see what you are attempting to do.