Router admin page help

Hi there. I have a siemens gigaset se567.

I have a bunch of ports forwarded. A LOT of entries.

So yesterday I ran through making sure my router was setup for WIFI because I purchased a UMA phone. I rebooted my computer and my IP address changed, so I went to edit the entries for the new IP and there were none listed.

So I tried to start reentering and I got the message saying there's already an entry.

It seems that I have so many that it created a "second page" which has no entries in it yet. My problem is I cannot view the "first page"

Anyone else have this router and this problem and know how to rectify it ?

Thanks in advance !