How to do a wheeli and stopee?

I have pulsar 150 dtsi....... i tried wheeli and stopee for just 3 or 4 times.... i can raise up front tyres for 1 or 2 second but i cant carry it....... so please help me..... and tried 3 times for stopee but the rear wheel doesn't come up...... so please help me do the wheely and stopee....