not again

Hey will anyone plz help me? I have a problem in commenting.
I last posted my comment the day I joined 12jan 2015 but whenever I post the commentagain error occurs saying u have just posted the last comment wait FOR 30 mins n try again .. I m unable to comment . Plz help me resolve this problem.

Now toh plz reply..humble request.

I've joined the forum just to comment my star..

And good news..got my 1st friend arpita di