[gentoo-user] gnu screen - copy'n'paste

Hi,

I am using screen to log into my beaglebone embedded computer, which
runs Gentoo (of course!) like this:

    ssh -t root@192.168.178.27 screen -R -d

. This makes it possible to detach the terminal and shutdown the PC,
while the beagle still runs processes...

BUT:
Unfortunately I cannot copy and paste things from my PC to a started
session like the way described above.

What is the problem here? ssh? screen? Or...simply my (mis-)
understanding of the whole thing ?

Best regards,
mcc