LED BLINK SKETCH LED REMAINS ON although digitalWrite (11, LOW); says LOW

Development Tools IDE 1.x
1

void setup(){
pinMode(10,OUTPUT);
}

void loop() {

digitalWrite(10,HIGH);
delay (300);
digitalWrite(10,LOW);
delay (3000);
}

Very easy Sketch but the LED on Pin 10 goes off for 0.3 sec and stays ON for 3 sec
How can

2

Slightly different story from this one.
What's the problem?

Please remember to use code tags when posting code

3

How is the led connected ? Via resistor to 0v.

Note you have 300 and 3000 mS set, make those the same to start with