WNR200, uPnp nas, media+print server

[lrkwz]

Hello,
i have a home network with:
1) adsl router w/DHCP on net 192.168.1.
2) WNR2000 wi-fi net 172.16.0 natted on 192.168.1
3) al Lacie networkspace2 device (nas, print server media server) uPnp enabled

the lacie device is accessibile from the wi-fi network but it isn't discoverable via uPnp (you MUST know the ip address); which makes it unusable from my wifi enabled tv set.

Can anybody suggest how to solve this problem (except from moving the nas into 172.16.0)?

Thank you