How to eliminate the Extra space between textboxes

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ASP.NET

An aspx page contains a couple of textBoxes. For a textbox, there are 3 Validators, which shows an extra spacing between this textbox and another one below it. If there are only 2 validators, the extra space is gone. I tried the ccs but not effective. How can the extra space be eliminated? Thanks.

        <tr>
            <td style="text-align: left">
                <asp:Label ID="lblPasswordNew" runat="server" CssClass="lbl" Font-Bold="true" 
                    Font-Size="Small" Text="New Password:">
                </asp:Label>
                    </td>
            <td class="style1">
                <asp:TextBox ID="txtPasswordNew" runat="server" AutoPostBack="false" 
                    ClientID="txtPasswordNew" Font-Size="Small" MaxLength="45" 
                    onKeyDown="keyPress();" onKeyPress="keyPress();" TabIndex="3" 
                    TextMode="Password" Width="150px">
            </asp:TextBox>
                <asp:Label ID="txtPasswordNew_V" runat="server" CssClass="lbl_req" Text="*" 
                    Width="5px"></asp:Label>
            </td>
        </tr>
        <tr>
            <td colspan="3" 
                style="text-align: center;padding-removed.12em;padding-removed.12em;">
                <asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" 
                    ControlToValidate="txtPasswordNew" CssClass="lbl_error" Display="Dynamic" 
                    ErrorMessage="Password cannot be empty.">
            </asp:RequiredFieldValidator>
                <asp:RegularExpressionValidator ID="RegularExpressionValidator2" runat="server" 
                    ControlToValidate="txtPasswordNew" CssClass="lbl_error" Display="Dynamic" 
                    ErrorMessage="Password must contain minimum 8 characters at least 1 upper case alphabet, 1 lower case alphabet, 1 number and 1 special character (!,@,#,$) and is case sensitive." 
                    ValidationExpression="^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[$@$!#])[A-Za-z\d$@$!#]{8,45}">
            </asp:RegularExpressionValidator>
            <asp:CompareValidator ID="CompareValidator2" runat="server" 
                    ControlToCompare="txtPasswordOld" ControlToValidate="txtPasswordNew" 
                    CssClass="lbl_error" 
                    ErrorMessage="New password must be different from the old one." 
                    Operator="NotEqual" Type="String">
            </asp:CompareValidator>
            </td>
        </tr>
// --------- css below --------
        .lbl_error  {
            font-family: helvetica, arial, sans-serif;
            font-size:smaller;
            text-align:center;
            color:Red;
        }