I am trying to reset Arduino UNO, no resetting is preformed.

Hello, I just bought an arduino UNO. and i made my first project (Using the book of Exploring Arduino Tools and Techniques for Engineering Wizardy, www.ExploringArduino.com) the problem is my project is making a program that makes the led on the arduino board blinks for a 1000ms every time and for ever, and it was successful experiment. but when i restart my arduino it just dont restarts like there is something blocking it!

thanks

Thank you guys, i just made a little research on the book and Google,

the problem was with the L LED, its programmed to blink like that and its not affected by a resetting button,

i reprogrammed the the board and works like a champ.

Thank you