I have both exactly as listed
Config file & my login is the same as yours, worked when I ran on windows 8 just not 7.... so strange
;Loginservers for Ultima Online
;Do not edit this file or patching will fail! Always save a backup.
LoginServer=107.23.176.74,7775
LoginServer=107.23.176.74,7776
LoginServer=107.23.85.115,7775
LoginServer=107.23.85.115,7776