Multiple Colums, change catalog title, HELP!

Hello! I want to post my galery exacly like this:

http://imageshack.us/photo/my-images/513/9tb7.jpg/

So, I’m trying to add multiple colums to my catablog post like it’s showed in the tutorial. I added this in style.css:

// we set the width below 50% to accommodate for the padding
// 50% = (width + left-padding + right-padding)
html body .catablog-catalog .catablog-row {
float: left;
width: 48%;
padding: 1%;
margin: 0;
border: 0 none;
}

But then I saw any change, I tried to put the code in the catablog.css that it’s asked in the tutorial, but nothing happened too, I put even the other exemples in the tutorial, but, nope.

I tryied the other tutorial just to test, like the Changing the Catalog Title’s Appearance tutorial, I put this code in style.css:

// makes the catalog title font arial or a sans-serif font with 12pt size.
html body .catablog-catalog .catablog-row .catablog-title {
font-family: ‘arial’, sans-serif;
font-size: 12pt;
}

But I saw any changes to my site, so I thought that it was some other problem like I saw after I was testing the plug-in, the catablog posts started to get a mess, like I’ve changed the shortcut in the post that it was already existed and then nothing change like:

[catablog_gallery id=”25″ template=”gallery” limit=”10″]

to this

[catablog_gallery id=”25″ limit=”10″]

I’ve tried to change the size of images in the galery’s post and the text started to stay behind the image or distance between images it’s huge and so the text. See the image of my site:

http://imageshack.us/photo/my-images/197/ddyi.png/

then when I reiniciate my pc the text and the other things was normal.

I’m using Photoria theme and I think he is disturbing in some way when I put some code to change my catablog post.

So, how I can do to got multiple colums and change my catalog title in my posts? I’m really confusing dude, what I have to do? Can someone explain detailed like in “zombie” way to me? I’m very new in this so…please.

http://wordpress.org/plugins/catablog/