When I finally went to the update.php and then I went to the index....
It showed an error...
Fatal error: Call to undefined function: theme_display_album_list_cat() in /home/futbolblanco/htdocs/galeria/index.php on line 493
What happened? Can anybody help me?
Your theme is not compatible with 1.2. You need to use a comparator program like winmerge to add the theme.php changes from 1.1 to 1.2. Also please use 1.2.1 as this is the latest stable code. If you do not know how to use a file comparison tool like winmerge(although it is fairly easy) just try changing one of the included themes to incorporate your old theme.