Qcad Beta in Ubuntu 11.04 x64

'/home/gabriel/opt/qcad-3.0.0-beta-trial-linux/assistant' 
/home/gabriel/opt/qcad-3.0.0-beta-trial-linux/assistant: error while loading shared libraries: libQtHelp.so.4: cannot open shared object file: No such file or directory
gabriel@gabriel-Studio-1558:~$ '/home/gabriel/opt/qcad-3.0.0-beta-trial-linux/qcad-trial' 
/usr/lib/gtk-2.0/2.10.0/menuproxies/libappmenu.so: clase ELF errónea: ELFCLASS64

(<unknown>:4849): Gtk-WARNING **: Failed to load type module: /usr/lib/gtk-2.0/2.10.0/menuproxies/libappmenu.so

/usr/lib/gtk-2.0/2.10.0/menuproxies/libappmenu.so: clase ELF errónea: ELFCLASS64

(<unknown>:4849): Gtk-WARNING **: Failed to load type module: /usr/lib/gtk-2.0/2.10.0/menuproxies/libappmenu.so


(<unknown>:4849): Gtk-WARNING **: /usr/lib/gtk-2.0/2.10.0/immodules/im-ibus.so: clase ELF errónea: ELFCLASS64

(<unknown>:4849): Gtk-WARNING **: Loading IM context type 'ibus' failed

(<unknown>:4849): Gtk-WARNING **: /usr/lib/gtk-2.0/2.10.0/immodules/im-ibus.so: clase ELF errónea: ELFCLASS64

(<unknown>:4849): Gtk-WARNING **: Loading IM context type 'ibus' failed
/usr/lib/gtk-2.0/2.10.0/menuproxies/libappmenu.so: clase ELF errónea: ELFCLASS64

(<unknown>:4849): Gtk-WARNING **: Failed to load type module: /usr/lib/gtk-2.0/2.10.0/menuproxies/libappmenu.so

/usr/lib/gtk-2.0/2.10.0/menuproxies/libappmenu.so: clase ELF errónea: ELFCLASS64

(<unknown>:4849): Gtk-WARNING **: Failed to load type module: /usr/lib/gtk-2.0/2.10.0/menuproxies/libappmenu.so


(<unknown>:4849): Gtk-WARNING **: /usr/lib/gtk-2.0/2.10.0/immodules/im-ibus.so: clase ELF errónea: ELFCLASS64

(<unknown>:4849): Gtk-WARNING **: Loading IM context type 'ibus' failed
application directory:  "/home/gabriel/opt/qcad-3.0.0-beta-trial-linux" 
working path:  "/home/gabriel/opt/qcad-3.0.0-beta-trial-linux" 
library path:  "/home/gabriel/opt/qcad-3.0.0-beta-trial-linux/plugins" 
Debug:    Init script plugins... 
Debug:    TIMER:  26623 ms -  "loading and initializing plugins" 
Warning:  RScriptHandlerEcma::doScript: engine busy: aborting evaluation of script: 

 "scripts/File/NewFile/NewFile.js" 

 
Warning:  QScriptEngine::newVariant(): changing class of non-QScriptObject not supported
Debug:    Creating storage... 
Debug:    Creating spatial index... 
Debug:    Creating document... 
Debug:    Creating MDI child... 
Debug:    Initialize Viewports... 
Debug:    Init graphics view... 
Debug:    Init scrollbars... 
Debug:    Init rulers... 
Debug:    Init idle and default actions... 
Warning:  QScriptEngine::newVariant(): changing class of non-QScriptObject not supported
Debug:    RDocumentInterface::deleteTerminatedActions: mutex lock failed 
Debug:    lock failed:  "EACTION FINISH: scripts/Snap/Auto/Auto.js" 
Debug:    locker:  "NEW" 
Debug:    lock failed:  "EACTION RESUME: scripts/Idle/Reset/Reset.js" 
Debug:    locker:  "NEW" 
Warning:  QScriptEngine::newVariant(): changing class of non-QScriptObject not supported
Debug:    RDocumentInterface::deleteTerminatedActions: mutex lock failed 
Debug:    lock failed:  "EACTION FINISH: scripts/Snap/RestrictOff/RestrictOff.js" 
Debug:    locker:  "NEW" 
Debug:    lock failed:  "EACTION RESUME: scripts/Idle/Reset/Reset.js" 
Debug:    locker:  "NEW" 
Debug:    Show MDI child... 
Debug:    lock failed:  "RMainWindowQt::subWindowActivated" 
Debug:    locker:  "NEW" 
Debug:    Init event handler... 
Debug:    updateScenes... 
Debug:    updateGuiActions... 
Debug:    notifyListenersSlot... 
Warning:  QScriptEngine::newVariant(): changing class of non-QScriptObject not supported
Debug:    RDocumentInterface::deleteTerminatedActions: mutex lock failed 
Warning:  QScriptEngine::newVariant(): changing class of non-QScriptObject not supported
Debug:    RDocumentInterface::deleteTerminatedActions: mutex lock failed 
Debug:    setActiveSubwindow... 
Warning:  QScriptEngine::newVariant(): changing class of non-QScriptObject not supported
Debug:    RDocumentInterface::deleteTerminatedActions: mutex lock failed 
Warning:  QScriptEngine::newVariant(): changing class of non-QScriptObject not supported
Debug:    RDocumentInterface::deleteTerminatedActions: mutex lock failed 
/usr/lib/gio/modules/libgiobamf.so: clase ELF errónea: ELFCLASS64
Failed to load module: /usr/lib/gio/modules/libgiobamf.so
/usr/lib/gio/modules/libgvfsdbus.so: clase ELF errónea: ELFCLASS64
Failed to load module: /usr/lib/gio/modules/libgvfsdbus.so

(<unknown>:4849): Gtk-WARNING **: Error loading theme icon 'window-close' for stock: No se ha podido cargar el módulo de carga de imágenes: /usr/lib/gdk-pixbuf-2.0/2.10.0/loaders/libpixbufloader-svg.so: /usr/lib/gdk-pixbuf-2.0/2.10.0/loaders/libpixbufloader-svg.so: clase ELF errónea: ELFCLASS64

(<unknown>:4849): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed

** (<unknown>:4849): CRITICAL **: murrine_style_draw_render_icon: assertion `base_pixbuf != NULL' failed

(<unknown>:4849): Gtk-CRITICAL **: IA__gtk_style_render_icon: assertion `pixbuf != NULL' failed

(<unknown>:4849): GdkPixbuf-CRITICAL **: gdk_pixbuf_get_pixels: assertion `GDK_IS_PIXBUF (pixbuf)' failed

(<unknown>:4849): GdkPixbuf-CRITICAL **: gdk_pixbuf_get_width: assertion `GDK_IS_PIXBUF (pixbuf)' failed

(<unknown>:4849): GdkPixbuf-CRITICAL **: gdk_pixbuf_get_height: assertion `GDK_IS_PIXBUF (pixbuf)' failed
Segmentation fault