Problema con una tabella - Linne orizzontali

[superdiogene]

Ciao ho creato una tabella, ma non riesco ad eliminare le righe orizzontali. Come posso fare? Nella configurazione della tabella ho messo a zero la dimensione del bordo.

<table height="200" style="width: 90%; background-repeat: no-repeat;" width="1017">
    <tbody>
        <tr>
            <td colspan="1" rowspan="3" style="text-align: center; width: 161px;">
                <img alt="" src="images/icone/uomo_donna.png" style="width: 128px; height: 128px;" /></td>
            <td colspan="2" style="width: 444px; white-space: nowrap;">
                <span style="font-size:28px;">{niceuserinfo:name}</span></td>
            <td colspan="2" style="white-space: nowrap; width: 50%;">
                <span style="font-size:28px;"><span style="color: rgb(255, 255, 255);"><span style="background-color:#3399ff;">Username:&nbsp; {niceuserinfo:username}</span></span></span></td>
        </tr>
        <tr>
            <td style="width: 190px;">
                <span style="font-size:16px;"><strong><span style="color: rgb(105, 105, 105);">Email:</span></strong></span></td>
            <td colspan="3" style="width: 551px;">
                <span style="font-size:16px;"><span style="color: rgb(0, 153, 204);">{niceuserinfo:email}</span></span></td>
        </tr>
        <tr>
            <td style="width: 190px;">
                <span style="font-size:16px;"><strong><span style="color: rgb(105, 105, 105);">Data registrazione:</span></strong></span></td>
            <td colspan="3" style="width: 551px;">
                <span style="font-size:16px;">{niceuserinfo:registerdate}</span></td>
        </tr>
        <tr>
            <td style="width: 161px;">
                <p style="text-align: center;">
                    <button class="btn btn-info" type="button">Modifica profilo<br />
                    </button></p>
            </td>
            <td style="width: 190px;">
                <span style="font-size:16px;"><strong><span style="color: rgb(105, 105, 105);">Ultimo accesso:</span></strong></span></td>
            <td colspan="3" style="width: 551px;">
                <span style="font-size:16px;">{niceuserinfo:lastvisitdate}</span></td>
        </tr>
    </tbody>
</table>

2014-11-30_09-20-42.jpg