Connection to DVI-Monitor

I have a problem with my NEO C (HDMI-Version). I can connect with monitors over a HDMI-cable. But if I want to connect to a Monitor, which only supports DVI-Connections, I can't get any connection.

I'm using a simple HDMI-Cable an a DVI-to-HDMI-Adapter.

Is this combination supported, or am I trying somethin impossible.

Do I nead a Firmware-Update for my NEO C? How can I check, which Firmware I have?

Thank you.