My server doesn't show up in Master list.

[Arjen]

What's the startupline?

You need to open these ports for the server at port 27015:

UDP: 1200 (used for friends service)
UDP: 27000 to 27015 inclusive
TCP: 27020 to 27050 inclusive
UDP: 27015 and 27020 (default HLDS, SRCDS and HLTV port)
TCP: 27015 (SRCDS Rcon port)

For the second server use port 27025 and the thirt 27025 (so 10 port in between)