outlook doesn't/won't remove sent mail from outbox

  phaeton 22:02 06 May 04

just had my dad on the phone and his Win2000 pc stopped removing sent mail from his outbox (to sent) on (or around) 23/4/2004.
now it constantly tells him he has unsent mail (but he has checked and recipients has got it) and if he sends a new email all those he has sent sonce 23/4/2004 go again.
can't delete them from outbox either, but can copy them to sent via right click - but that doesn't help!
any bright ideas please - I admit to not really understanding Outlook.
Finally it may be OE or Outlook - not sure I am afraid. If critical I can of course find out.

  VoG II 22:04 06 May 04

It is critical, plus the version.

  phaeton 22:34 06 May 04

hope that enough detail!

  phaeton 18:38 09 May 04

I would appreciate any you have!

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