your English is much better than I would be, trying to use your native language.
I assume you are using a external monitor.
See if it has internal settings for resolutions, it will use or auto use.
I have a monitor that will give that error, if you try to run it in any resolution, that is not it's native, set resolution.
When you boot.
Do you see a menu that has an entry to boot no X?
If yes.
Boot using the no X entry.
It should boot to a prompt.
Enter xorgwizard.
In xorgwizard you can set to use different resolutions.
Pick one you know should work.
When you close xorgwizard.
At the promplt enter xwin.
Hopefully that will get you to a desktop.
The other issue could be the graphics driver being selected for xorgwizard to use.
If the specs for your computer are correct.
Graphics Processor
ATI RAGE XL
Xorgwizard is probably trying to use the radeon driver.
You may need to select to use the vesa driver.
when/if you get to a working desktop.
Shutdown and make a save file/folder.
Boot now using the normal boot entry.
It should use the changes you made, because they should be stored in the save.