Shoutbox

Hi
Im useing MsgPlus ver 3.52.130 on MSN messenger ver 7 (7.0.0777)
Win XP pro sp2.
I have 2 acounts  in msn messenger (hotmail +another one ).
I have my POP3 mail details in one acount ( the hotmail.com ), plus the program to be opened when pressing the envelop on main window(msimn.exe).
On my other acount i dont have anything written .
When i press the mail link on main window it opens the internet explorer and not the  outlook express (presing popups does open the outlook).
When i enter my second acount (that has no definition of pop 3 mail)
pressing the mail link opens the outlook.
Is it me or is it a bug... how do i fix it ?
              thanks....