The '-e' i have found are located in /etc/modules and
/etc/modprobe.d/modprobe.conf (The last one is from memory so I may have the
path or name wrong). I removed those lines and the messages went away.
I too have been struggling with wifi (wifistix-cf). I was able to
successfully pair it with my neighbors open access point, and once with my
WEB-secured access point, however, on subsequent boots, I get an error
similar to yours, except "Set Enc"..."Operation not permitted", yet it was
the same key settings that worked previously.
Are you trying to connect to an open access point or restricted access
point. Do a man on iwconfig to see the options you have in order to
configure your wireless correctly.