Adding Data to FlexGrid?

Hi,
Im pretty new at vb, and Im facing a problem when Im trying to add item to a flexgrid. Iv hooked it up to a Database, with the table called "main" , with various fields. It manages to display the data from the database perfectly, yet when I go to add data using the AddItem command, it dont work. This is what Im trying:

(main is the name of the Flexgrid Control):

Private Sub Command1_Click()
grdmain.Col = 2
grdmain.Row = 2
grdmain.AddItem = test
test = InputBox("TESTING!")
End Sub

To begin with, an input box DOES NOT appear? However, I discovered that if I remove the GRD, so that the code looks like this:

Private Sub Command1_Click()
main.Col = 2
main.Row = 2
main.AddItem = test
test = InputBox("TESTING!")
End Sub

an input box DOES APPEAR, but the data is not added onto the FlexGrid - or rather, perhaps its added and does not show? (Iv tried opening the database to check, but it isnt added).
Any help highly appreciated. Thanks.

Private Sub Command1_Click()
try

test = InputBox("TESTING!")
grdmain.Col = 2
grdmain.Row = 2
grdmain.AddItem = test
End Sub

assignment got mixed up