VB6 Code Exiting For Next Statement Early

Hello, I wonder if anyone can help me with a problem I'm having please.

I have some code which is basically using a timer and checking an Outlook mailbox, and if there is an unread mail in there with an attachement, it strips the attachement out and saves it to a file location.

Code:

---

For Each item In InBox.Items
            vvalid = False
            If item.Attachments.Count > 0 And item.UnRead Then
                For Each Atmt In item.Attachments
                        txt1.Text = "PROCESSING FILE..." 
                        Set fso = New FileSystemObject
                        tempfilename = Atmt.FileName
                        tempfilename = Replace(tempfilename, " ", "_")
                        If fso.FolderExists(directory) Then
                            FileName = directory & tempfilename
                            Atmt.SaveAsFile FileName
                        Else
                            ErrorHandler "Public Sub ErrorHandling"
                            vvalid = False
                        End If
                        Set fso = Nothing                                                     
                        vvalid = True
                Next Atmt
                If vvalid = True Then
                    item.UnRead = False
                    item.Move olMoveFolder
                End If   
            End If
Next item

---

This all works fine and works very quicly.

However, if there are say 20 e-mails in the inbox the first time the code runs it will process 10 before exiting out of the code rather than processing all 20.

It will then wait a minute until the next timer event ticks over and it will process 4 more.

Initially I thought it was doing this because of the fact that the timer event was ticking over part way through the process, but if that were the case then surely the 2nd time it would also process 10 files?

I need it to process the whole number of files on the first run through, and I can't understand why it's coming out of the code.

Can anyone shed a light on this please?

if you remove items within your loop the indexes get changed and the next item is skipped
try using a reverse loop

vb Code:

for i = inbox.items.count - 1 to 0 step -1
  set item = inbox.items(i)
  If item.Attachments.Count > 0 And itemsUnRead Then