Belkin F5D7633 Connecting WIMAX Internet To ADSL Router

I have a Wimax internet connection via an ethernet cable from a small roof top receiver dish. Inside the house the cable (RJ45) is plugged into the POE slot on one side of a small electrically powered black box, and from the other side, an ethernet cable (RJ45), connects to my PC. I want to share my internet connection with my HTC mobile and would prefer to make use of an existing Belkin 54g ADSL2 modem/wireless router (Belkin F5D7633) if I can. As this router's incoming port is specifically for ADSL my internet RJ45 cable can not plug into it. I have been advised that I can still utilise the router part of the Belkin though, using my PC as an access point, by plugging the ethernet cable from the PC side of the little black box into LAN 1 on the router, then joining the PC to LAN 2 of the router with another ethernet cable.I did not alter the configuration of the Belkin at all (having reset factory defaults beforehand), mainly because although I could access the internet from my PC and my mobile, I could not access the IP address of the router, presumably because the properties of the local area connection on my PC remained unchanged with the IP address (172.168.1.149), Subnet Mask (255.255.255.0), Default Gateway (172.168.1.1) and 3 DNS addresses (172.168.1.1) (10.30.0.1) (8.8.8.8) as they were before hooking up the Belkin. The IP address the mobile received through WIFI on connecting to the Belkin was 172.168.1.148

I was not unduly concerned about not being able to access the configuration of the router as everything was working as I had hoped it would and even when I powered off my PC I still had internet access on my mobile. On rebooting the PC, however, I found that the router changed the DNS addresses on the PC to 2 only, both identical (192.168.2.1) and the IP on the mobile was allocated 192.168.2.2 Although I could still access the internet on my PC, I no longer had access from my mobile although the WIFI connection to the Belkin showed as being 'excellent'. When I did a 'repair' of my internet connection, hoping to revert to a fully operative state, the PC configuration changed again as follows: IP address becomes that of the router (192.168.2.1), Subnet Mask (255.255.255.0), Default Gateway (192.168.2.1), 2 DNS addresses (192.168.2.1) and the IP address allocated to my mobile remains (192.168.2.2) This configuration means I have no internet access from either PC or phone, but CAN access the router configuration. I restored a usable operating state by unplugging the power from the router, transposing the cables in the LAN ports on the router (swapped cable from LAN1 to LAN2 and vice versa), turned off WIFI on mobile and waited a minute or two. When I powered the router back up and switched on mobile WIFI again, everything was restored to the original working state and I have, once again, access to internet on both PC and mobile. It is very frustrating, however, to keep performing this ritual and I wonder if any of you more technically minded, know a way to work around this, perhaps by manually changing the configuration of PC or router?