[CentOS] Does anyone know how to get clipboard and mouse integration in Centos vm?

Hi,

I am running a Centos 7 vm under FreeBSD, and it works very well now, 
with KDE installed from DVD iso.

But there's a couple of things missing, which happens only with Centos 
vm (Virtualbox):

1) Despite clipboard sharing enabled, copy-paste just does not work 
between host and guest

2) Mouse integration does not work. So I have to repeatedly capture 
mouse manually both in the host and in the guest.

If anyone could provide me tips how to tweak the above, it shall help me 
a lot.

-- 
Thanks & Regards,
Manish Jain