Yes I was trying to post a comment but i can't do it.. I don't know why but everytime click on post reply or new topic another page says error using this alternative.. or .. you don't know how to use this feature..?.. why this happen.?

Help me please..
thank you.

You're in the Validating group right now which means you need to approve your email (if you already haven't but if you have I'll PM/ contact someone to take a look at why).