Cannot change my meeting time
 

I sent a meeting invite, and in the To: list is an alias that I happen to be
a part of. Now I am listed as a required participant (even on my calendar),
and I cannot change the meeting details. I did not accept the meeting at
first (just deleted the invite from my inbox), but later, in troubleshooting,
did accept. I ended up having to delete the meeting invite and resending. Is
there a solution for this? I am using Outlook 2003 with Exchange on XP Pro.
Thanks.