Starting GUI (KDE) works from command line but not from inittab (run level 4)

I am running Slackware 15+ current, all was working perfectly in this respect, but then logged in remotely and issued:
Quote:

sudo shutdown -h now

once shutdown I unplugged everything plugged into new power backup. Booted up asked for password for the sudo user displayed the KDE icon on centre of screen, screen went black displayed mouse icon on screen and that's where it stayed. If I change to run level 3 reboot (logged in remotely to achive this). When it reboots and enter same username and password and type startx, it start's up perfectly. I switch back to run level 4 it goes back to sitting at the black screen with mouse icon on screen after password is typed in. Not sure why it would work perfectly from command line and not at all when using run level 4. Any ideas on this would be greatly appreciated. Thank you in advance.