Designtime Column Headers Not Displaying

[Mathews_Chris (Chris Mathews)]

I have the following columnheaders set and visible at designtime:

      ColumnHeaders.Strings = (

        'Invoice_Date'

        'Invoice_No'

        'Claim_Id'

        'Adjustment_Rsn_Code'

        'Recovery Amount'

        'Commission_Pct'

        'Amount'

        'Vendor_Number'

        'Vendor_Name'

        'Vendor_Location'

        'Business_Unit'

        'GL_Account'

        'MBU'

        'Funding_Type'

        'Product'

        'Vendor_Comments')

When I run the app, my column headers are A, B, C,.....  Am I missing a setting?

[brunofierens]

Is this TAdvStringGrid or TAdvSpreadGrid?
If this is TAdvStringGrid, I cannot see such issue. If this is TAdvSpreadGrid, please set grid.AutoHeaders = false.

[Mathews_Chris (Chris Mathews)]

Thanks