Why do I get an OleDbException when updating an Excel cell multiple times?

I am using the following code to update a cell in an Excel file.

public bool WriteChange(string Filename, string SheetName, string Cell, string Value)
{
    if(!System.IO.File.Exists(Filename))
    {
        throw new System.IO.FileNotFoundException("File \"" + Filename + "\" could not be found");
    }
    bool result = false;
    string ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Filename + ";Mode=ReadWrite;Extended Properties=\"Excel 8.0;HDR=NO;\"";
    string SQL = "UPDATE [" + SheetName + Cell + ":" + Cell + "] SET F1='" + Value + "'";

    using(OleDbConnection Connection = new OleDbConnection(ConnectionString))
    {
        Connection.Open();
        using(OleDbCommand cmd = new OleDbCommand(SQL,Connection))
        {
            int value = cmd.ExecuteNonQuery();
            if(value > 0)
            {
                result = true;
            }
        }
    }
    return result;
}

Which works fine if I don't try to update the same cell multiple times. After a cell has been updated using this function, it can never be updated using this function again. If I try to refresh the cell again; even after restarting the application, I get OleDbException: System Resource Exceeded.

I know that you usually get this exception if you create a bunch of connections to a spreadsheet (for example, in a loop), but I connect only once for each application launch. Typical workflow.

• Launch the application.
• Challenge WriteChange.
• Exit the application.

, ?