Unable to block. How do I block?

How do I block? do i drag? double click? nothing seems to be working.
I am fairly new this..
here is a screenshot.. wtf i cant post a picture.. says "Your post looks too spamy for a new user, please remove off-site URLs."
so here is the url...
i57.tinypic . com/34rvqzd.jpg

I am fairly new this..
here is a screenshot.. wtf i cant post a picture.. says "Your post looks too spamy for a new user, please remove off-site URLs."
so here is the url...
i57.tinypic . com/34rvqzd.jpg