I recently installed Linux Mint 13 alongside windows 7. I have a Realtek RTL8191SEvB Wireless Card. This work's fine with any router. However when I try to connect to a Belkin G Wireless Router it constantly says the passwords or encryption type are incorrect. They are not. I can connect to the Belkin router when I start my laptop (a toshiba satelite) with windows. Any ideas?
When you say you installed it alongside windows do you mean that you are dual booting windows and mint? Or are you running a virtual instance within windows?
Either way try this from the command line:
ifconfig wlan0 up && iwlist wlan0 scan | egrep -i "ssid|cipher"
If you get some kind of error check to see if you even have a wlan0 config file in your network-scripts folder. You can omit the pipe to egrep if you want a bunch of irrelevant info. Then do:
iwconfig wlan0 essid "your network name goes here" key s:"your wireless password" dhclient wlan0