我正在使用Selenium IDE为我的站点编写测试，但是我无法让selenium使用上一个同级按钮单击按钮

<td>
<div class="btn-group">
<button class="btn btn btn-danger block" title="Warning, Delete" name="delete" type="button">
<button class="btn btn btn-default block" title="View History" name="history" type="button">
<button class="btn btn btn-default block" title="View Settings" name="settings" type="button">
<button class="btn btn btn-default block" name="device" type="button">
<span class="glyphicon glyphicon-pencil"/>
 Arcade Reader
</button>
</div>
</td>

我自己的路

xpath=//button[contains(.,'Arcade Reader')]/../preceding-sibling::button[@name='settings']