A few ideas and/or questions.
Use WEP it should connect easier for awhile.
What is your wifi card hardware ?
Who is your DSL provider ?
Use the PCL Control Center as much as possible.
Browse hardware, delete the connection, run config, the usual routine.
Reboot between major configuration changes, it helps to clear the old out
and the new in.
I find PCL fairly easy, sometimes too easy, makes my mind lazy in regards
to these things. I remember configuring XXX distro (name omitted) and
I had to enter 13 things, yes 13, accurately, to get the wifi to work. PCL
was a few checks for auto-configuration and it auto-set everything and still works.
WPA appears to be a current problem, config files not being properly updated
or some similar problem. Well known and should be fixed soon I would think.