VS 2008 C# Input string not in correct format

Why am I receiving a message about input string not of correct format on this line?

if (Int32.Parse(dgvFlagTransactionsView[9, dgvFlagTransactionsView.CurrentCell.RowIndex].Value.ToString()) == 0)

At first I did not have the Int32.Parse method but I had to add that because I got a message about == cannot be used with object or int.

I have a cell on a datagrid that has a checkbox. What I am trying to do is change the value in the actual field. So if it value was 0 change it to 1, if its value was one change it to 0. The value is in column 10 of the grid.

private void dgvFlagTransactionsView_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {
            try
            {
                if (e.ColumnIndex == 0 && e.RowIndex >= 0)
                {
                    if (Int32.Parse(dgvFlagTransactionsView[9, dgvFlagTransactionsView.CurrentCell.RowIndex].Value.ToString()) == 0)
                    {
                        dgvFlagTransactionsView[9, dgvFlagTransactionsView.CurrentCell.RowIndex].Value = 1;
                    }
                    else
                    {
                        dgvFlagTransactionsView[9, dgvFlagTransactionsView.CurrentCell.RowIndex].Value = 0;
                    }
                }
            }
            catch (Exception ex)
            {
                string eMsg = "003E: ERROR: " + ex.Message;
                if (stackTraceWanted) eMsg += "\n" + ex.StackTrace;
                MessageBox.Show(eMsg);
            }

        }

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