Access RT31P2 on LAN?

I have my RTP312 on my local LAN, behind my router. (Wanted it in front of the router but that doesn't work.) If I plug a notebook into one of the RTP312's LAN ports, otherwise unused, I can access its admin panel, but if I connect from my regular PC, through the RTP312's WAN port (which is connected to my router and has a local IP), it never responds.

Is there a setting that disables "remote" access like this? I went through the admin panel and could not find it.

Your trying the address you or your dhcp server have given the device right?

http://yourataip:9999 or :8080

Yes, I'm using the DHCP address, but not the port. Will try the port.

9999 did the trick - thanks.