How to Restring My Tabla?

I have a tabla that has been severely detuned. I put my treble side on 3-4 ropes and it's still very lose and low pitched. I was wandering if someone can help me restring the tabla. I think If I soften up the rope, by heating it up and then just repulling it or pulling it tighter it might work, or do I have to take off the head and re-string the whole thing? Please let me knwo what my options are. I even put it up to 4 ropes per peg and it still wasn't very high pitched.