I have made my installation from a fat32 partition.
My first error was to select the options i want in the menu and to press continue and not select. So my partitions were not formated
After resolving this error, i had sata problems on the boot time (after installation). In fact it's because i choosed the default kernel, so to solve it i choosed "bzimage from my floppy". The floppy was the image created from the sata.i file. And the sata is now supported at each boot time.
And finally my third problem, i had not kde or gnome in my setup menu, so i have copy the kde and gnome folders from the 2nd cd to the slackware folder of the cd1 (my cd1 is in my fat32 partition). And they appear in the setup menu of the installation.
Thanks for your help.