Self signed Certificate

Dear all,

I am new with HP and quit a newbie.

I created a new server-certificate on my fire-wall (pfSense) to use it on my HP-1820-24G.

So far I can export CRT-, KEY- and P12-files from the fire-wall ...

What do I need to do to import the certificate on the HP successfully ?

HP is asking to import PEM-format, if I convert from CRT- into a PEM-file, the switch do not recognize them as a certificate :-(

Any help is highly appreciated :-) !!