Thank you Rajesh, but the thing is - When I enter my Paypal password, It asks for a Credit Card Number with expiry date and all that. Now I do not have a credit card or a credit card linked to paypal because I never had the need as I used paypal to withdraw my funds from scriptlance.
And it has a message at the top: "To complete this payment, add a debit or credit card to your PayPal account. Your card will not be charged unless the transaction amount exceeds your balance."
I have attached a snapshot.
If you know anything about this, please let me know.