Exchange Calendar Problems with recurring appointments

I'm running SBS 2003 with Exchange 5.5 for a client. I have a problem with a reoccurring appointments not  showing up on a calendar. The person who created the item can't see the appointment, although everyone else who it is shared to can see it.

I have tried to Remove temp files for Outlook 2003, Reinstalled Windows XP. It looks like it is a server related problem but i don't know where to start looking.

He can view other reoccurring appointments, that he has created. When we recreate the appointment it show both double on everyone else's machines, but only 1 on his. I have been going around in circles with this for a while now. Any help would be great.

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Recreate his outlook profile on another machine and see if it works.  If it does, then his outlook profile is corrupted.
eke-the-electronAuthor Commented:
tastas: how do i go about setting up the outlook profile? just add a new exchange account thru outlook?

kieran_b: not sure, i will try and get the user to log in and check it out.
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On the new machine, have the user log in.  Then go to control panel --> double click on mail --> click on ADD and go through the rest of the wizard.
eke-the-electronAuthor Commented:
I recreated the mail account on another machine. just getting the client to double check to see if the appointment is there or not. i suspect that it isn't, so in that case the mail box needs to be recreated. how do i go about doing that? just delete it out of outlook and then recreate it via the mail option in Control panel?
eke-the-electronAuthor Commented:
managed to fix it. cache mode was turned on, turned it off and the problem was solved. thanks for the ideas.
To use switches, at the Start menu, Run

outlook /cleanreminders
outlook /cleandmrecords
outlook /cleanfreebusy
outlook /cleanprofile
outlook.exe /freereminder
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