Bad Wireless Connection Using D-Link DWL-G510
So, I've just got a new desktop pc and I've installed Slack 12.0 on it. I have a D-Link DWL-G510 wireless card. It uses the Madwifi chipset/drivers, which I downloaded and installed successfully. My wireless connection shows up as ath0.
Then since I'm using WPA, I put all my information in the wpa_supplicant.conf. After connecting, the iwconfig shows that I have a very weak signal. It's bad enough that I cannot even get online.
Is there a way to improve my connection? Like extra drivers, firmware, etc?
Also, what file do I have to edit to allow my wireless to connect on startup. I'm used to doing it in /etc/network/interfaces. But, Slackware doesn't seem to have that.