KDE 4

I just installed OS11.0 RC1. Had it install both KDE3 and 4. 3 starts as default . I’m unable to log into KDE4. When I log out and try to go to 4 I get this message.“Could not start KDEINIT4”. check your install".
How do I do that?
Thanks,
Ron
ps I think it upgraded to GM but I’m not sure. How do I check that? In my computer it shows no indication on that,

I did a clean install and got only KDE 4. Did you upgrade?

No, it was a clean install.