momentory blinking of LED in the start

I was writing code in c language for 8051 micro controller. In my application, a switch ( when pressed)connects P3^0 (which is initialized as an input port by writing a 1 to it in the start of the code) to ground. Then my code continuously checks for the switch status and whenever pressed it will make P2^0 high for 1 second time. To P2^0, an LED is connected. in the start of the code i have made P2^0 =0 to avoid the LED blinking before the switch is pressed. I have checked my code and found working fine except for a minor problem. Whenever power is made ON (or controller is reset), the P2^0 becomes high for a moment AND LED also blinks for a moment. This is something i don't want to happen in my application.I am not getting any idea to tackle this problem. kindly help me..

thanking you
satish kumar
mumbai, india.