I want to make lines like this but even if I check "simulate pressure" I dont get the same.

What I want:



What I get:

The first picture you posted doesn't load for me so I'll assume that you want to create lines with smoothed and slim edges? If so, try clicking the Brush tool, then clicking the Brush tab near the top right hand corner. Then click "Shape Dynamics" and set the Control to "Fade". If that's not what you want I'm sure it might be somewhere in that Brushes tab in the top right corner, so play around with those.

If that's not the problem you're talking about at all then forget I even posted this.

Thank you and yes I wanted what you said.
BUt I cant find Fade button ill search for it

Here: http://i43.tinypic.com/5ez3tg.png

Still..dont looks like this:
http://i39.tinypic.com/21bod53.jpg

When you do the stroke.. you select stimulate pressure

Play around with the minimum diameter slider. Depending on where you put the slider, you will either see the result or not. For example if you set it to smooth out the line after 100 pixels and you make a 20 pixel line, it will just look like a normal line.

or just do what i said lol

use a soft brush not a hard brush