Issue with DHCP static lease - WNR3500LV2 and Tomatousb shibby

Hi,

I have just purchased a WNR3500LV2 router on which I have installed the latest Tomatousb Shibby firmware.

I'm using the router as a bridge (the router is setup in a wireless client mode, the static address of my router is 192.168.0.19)

I have plugged my raspberry pi on the router, I have defined with the raspberry pi MAC address a static lease pointing to the following ip address 192.168.1.1.

I have defined some port forwarding in ordetr to access my raspberry pi from the first network 192.168.0.X/24 and from the internet.

I'm able to ping the raspberry pi (192.168.1.1) from the tool menu. But after several hour it seems that i'm losing the static lease for the raspberry pi and if I perform a ping from the router tool menuon the following address 192.168.1.1 all the packets are lost.

I think I have probably missed something as part of my initial setup.