In addition to Hacks' correction, there is a minor flaw with your use of ItemData - you need to specify which rows ItemData you want (even if it is selected). You can do it like this:
VB Code:
  1. sSQL = sSQL & "'" & cboCategory.ItemData[u](cboCategory.ListIndex)[/u] & "', "

edit: so close, but you beat me to it!