DNS Record of Main Domain

Hi, i’d like to use a pointer record for my Univention domain although when doing the pointer record nothing actually happens, same thing with my added router.
I tried to add this to the pointer record.

For example, I can go to primary.domain.intranet but my second pointer record primary.intranet will not work. This works with other IP’s I have setup I’m just curious as to why two of these are not working. Just for note, the two I’m working with are also in the intranet section of the DNS along with the pointer section don’t know if that helps.

Thanks in Advance.