CA certificate import

I have an issue with using certificates on 6.7 (haven’t tried on previous versions).

After creating a set of self signed certificates, which I imported successful into /certificates, I would like to import the Root CA certificate to be able to validate the client certificates.
After importing ca.crt (PEM format, it appears as cert2), there is no “CA” property set for that certificate (it gives me KT, not KTC, other machines, windows and linux, see it as valid CA).
It also doesn’t show up if I want to add a SCEP server, where a CA is needed.

The use of “/certificate set cert3 ca=yes” is not allowed, ca being a read-only property.

Is there a workaround for this issue?

Tnx, Marius.