Not able to post articles

Hi, i m a regular blogger in this website by posting my articles from my blog www.pratishamin.wordpress.com. But from the few week i m not able to post my article in my dashboard as it shows message of "Not more than 400 charactors" in fact, articles which i m posting are arounf 250-350 words. But still the same issue. i even maild indiblogger team but no reply.

Can any one help me to get out of this siutation, if anyone faced it before? This can help me post articles as before.

Reagrds

Pratish Amin