Yes I know, I read one more time your posts and I resolved my issue with the help of its.
About my video card, I give the model in a precedent post but, no problem, I repeat :
"About my video card, I get a ATI Radeon HD 4800 Series."
Thank a lot for your help 
Laszlo
Alright, it run !
I had to uncheck Hardware Acceleration Box.
Really weird !!
Thank everybody for your help.
I really appreciate your help and your sympathy
Laszlo
Damned, it doesn't work!
I don't understand why.
I get the absolute same view as your picture. I click on a face but ther's no automatic selection and nothing happen.
Why I don't get the same problem when I don't use GE ?
Sorry I don't get it.
I select Push/pull tool. I click on a face without unclick. I click on the wheel of my mouse in the same time and I turn the object in any way I can.
Then, I release all button of the mouse. Nothing happen.
Do I forget something ?
No pb, I speak fluently english 
Here we are, I joined an example. There's objects. The first, created before import GE map, has been already "pushed".
After done it, I imported the GE map. At this point, I'm no longer able to "push" my first object.
More weird, when I create a new rectangle (my second object), I'm not able to push it while I was able to do it in the first object before import GE map.
About OpenGL option, I checked all boxes.
About my video card, I get a ATI Radeon HD 4800 Series.
Thank for your answer Gaieus !
Sorry I'm not hungarian, I'm french. This firstname just refers to my familiy roots
Ok. I found the layer box. I uncheck the GE snapshop entry but now change. Always unable to elevate my rectangle.
But, now, I confirm you that, when I work from a new document, without Google Import, it works like a charm. No problem to use 3D tool.
But, always the same issue with Google import.
More weird, when I create in a first time a Building and after I import Google Image, I'm no longer able to transform my building as it became locked".
Any idea ?
Hello everybody!
Today is my first day with Sketchup and I already get an issue.
Well, I import a map from google, here no problem. I specify my axes : no problem. I create a rectangle : no problem.
But when I try, using, push/pull tool, to create a 3D form from my 2D rectangle, 9 times by ten I'm unable to select a face and, more, to make my rectangle growing !
In this case (issue), when I move my mouse outside the rectangle area, I get a small red-crossed circle near my mouse pointer
More precisly, when I've created my rectangle, I see him. After that, click on push/pull icon (small brown box with red arrow looking up). I move my mouse on the rectangle (near the middle), left-click one time and clicking another time on it, I move up my mouse.
And general, nothing happen excepted sometimes when it's works.
I sure I'm a fool and I forget to do something special : special way to create rectangle, select face before push/pull or something like that...
I confirm you that, 1 time by 10, it works correctly. I don't know how but it works.
Thank for your help, this drives me crazy !