How to delete mailitem after using redemption to send it (outlook 2007)

Hi,

Right now, I'm creating an add-in for Microsoft outlook 2007.  When
I'm sending out a mailitem, I'm using redemption to do this (because I
want to perserve the HTMLBody).  The trouble I'm getting is after I
send out the mailitem with redemption, I want to delete the mailitem
but I'm getting this error message "The item cannot be moved. It was
either already moved or deleted, or access was denied.".  I was
wondering if anyone can help me out?

thanks
Vinsanity