pfsense on Zotac ci329 nano, doesn´t start without monitor

[Bytchanger]

Hi,

I can´t get running pfsense on Zotac Zbox ci329 nano without monitor.
When I connect it (e.g. vga) it starts without keyboard and mouse. But when I disconnect Monitor before starting zbox, it doesn´t start.
Can anybody help me?

I´v e installed from USB stick 2.4.4-p1, amd64 (64.bit), USB Memorystick, vga version.

Greets

Byte