If you are sure that your CC had sufficient funds at that time, try again. if it still does not work, contact PayPal with your problem.
You need NOT have any funds in your PayPal account to make this transaction.
Thank you all for your swift replys. I have 2 questions.
1) How dO I transfer money from my card to my payal account?
2) Reju, I have 0 Rs in my credit card but i have 30,000Rs credit Limit and i have not reached that yet. I use this creditcard online all the time and get away with it.
Do I need to put some money in my creditcard account now?

Thank you all!