You haven’t said which operating system you’re using, so I’ve guessed at XP. Create static IP address:
In a Run window (Windows key+R), type cmd /k ipconfig /all (note the three spaces) and press Enter. Make a note of IP Address, Subnet Mask, Default Gateway and DNS Server(s), which have to be keyed in.
Go to Control Panel > Switch to Classic View > Network Connections and right-click LAN > Properties > General Tab, scroll down to Internet Protocol (TCP/IP) and double-click it. In the General Tab you need to put a check mark in Use the following… and then enter the address details from ipconfig. At the bottom of the General Tab, click Advanced > WINS Tab and put a check mark in Enable NetBIOS over TCP/IP.
Right-click the wireless icon in the Notification Area > Status > General Tab > Properties at the bottom, scroll down to Internet Protocol (TCP/IP) as above.