collection comparison not working...

I have 2 tables, the one holds all data for the horses that have been enrolled in an incentive program.
The other holds data for every horse.
Now I have them both opened, but only the horses that are in the first table can be selected, so i only want those inserted into a listview box...
This is the code i have so far.

VB Code:

Dim strId As Collection, strX As String
    Set strId = New Collection
    strX = "1"
    x = 1
    Do Until rcdTable2.EOF
        strId.Add rcdTable2(0), strX
        x = x + 1
        strX = x
        rcdTable2.MoveNext
    Loop
    intX = Int(strX)
    rcdTable2.Close
    Do Until rcdTable1.EOF
        strInsert = nonulls(rcdTable1(0))
        On Error Resume Next
        strId.Item (strInsert)
        If Err.Number = 0 Then
            Set lsiItem = frmMain.lsvEnrollHorse.ListItems.Add(, , strInsert)
            For k = 1 To 14
                strInsert = nonulls(rcdTable1(k))
                lsiItem.ListSubItems.Add , , strInsert
            Next k
        End If
    rcdTable1.MoveNext
    Loop

now the problem is this..

if i dont' enter any number at all, it grabs all the records in the first table, holding all those enrolled in the incentive program.
But when it loops through the other table holding all horse info, it only finds a dozen or so numbers.. where there is 270+ in the incentive program, and 500+ horses.
So what am I doing wrong?

I think that the comparison i'm using the wrong syntax.

--> strId.Item (strInsert)

now strInsert is the index of the item, but i need to check every item.. do i have to do a for z to strId.Count loop???

strId.Item (strInsert) or just strId(strInsert) is correct syntactically but it is meant to return something, so you need to do something like MsgBox strId.Item(strInsert) where you use the returned value. I know that in your case you don't want to use MsgBox but I can't figure out what it that you want to do with the value from the collection.

Basically, if that ID number is found in the table holding all the registered horses, then it lets its data be inserted into the listview box.
if the horse is not found, then it skips it and goes on to the next horse found in the Horses Table.