Windows 7 Reverts Back To Old Wireless Profile On Reboot?

Windows 7 continues to revert back to the old wireless profile despite me deleting all old wireless profiles. Wireless adapter is Edimax EW-7128g, newest drivers for Windows 7 64bit First set up a WEP profile the usual manner by connecting using the bottom-right wireless networking widget; "Save this connection", yes. Works right off the bat, first time Needed to switch to WPA on router for better security. Same router. Done. Entered new credentials using the same wireless networking widget. Works fine first time, right off the bat. Computer enters sleep mode overnight. Upon a wake (or restart, or cold boot) - Windows 7 reverts back to the old WEP profile. I go into "Manage Wireless Networks" I select the profile from the list, hit DELETE. Removes it from the list. ADD new profile, supply proper WPA credentials, "Save this connection". Works fine. Manage wireless networks displays proper information (WPA security) Restart, or reboot, or logoff. BOOM. Back to using the old WEP profile!Tried this using Administrator account and user account. Same behavior. Workaround is to change the security type credentials or delete & create a new profile every time windows is rebooted/logoff/restart. I cannot for the life of me figure this out. I am not using the vendor's connection utility. Windows cannot remember the new connection profile and despite me deleting the old one ... continues to revert back to it.