Re: Am i doing something wrong??
If you scroll down to the bottom of any board here you'll see what all the envelope icons mean.
I blue envelope with a white arrow coming out of it simply means that you have posted in this thread.
The blue envelope WITHOUT an arrow means that there are no new posts in that thread, therefore what you're seeing means that you've posted on that thread, but nobody else has responded yet.
It's not that they can't respond, it just means nobody has responded as of yet.