网页播放器中的下一个，上一个，两个按钮，始终显示为灰色，不能播放下一首

Question

<object id="Player" width="260" classid="CLSID:6BF52A52-394A-11d3-B153-00C04F79FAA6"
                style="height: 100px" >
                <param name="AutoStart" value="-1" />
                <param name="Balance" value="0" />
                <param name="enabled" value="-1" />
                <param name="EnableContextMenu" value="-1" />
                <param name="url" value="" />
                <param name="PlayCount" value="1" />
                <param name="rate" value="1" />
                <param name="currentPosition" value="0" />
                <param name="currentMarker" value="0" />
                <param name="defaultFrame" value="" />
                <param name="invokeURLs" value="0" />
                <param name="baseURL" value="" />
                <param name="stretchToFit" value="0" />
                <param name="volume" value="50" />
                <param name="mute" value="0" />
                <param name="uiMode" value="Full" />
                <!--播放器显示模式:Full显示全部;mini最简化;None不显示播放控制,只显示视频窗口;invisible全部不显示-->
                <param name="windowlessVideo" value="0" />
                <param name="fullScreen" value="0" />
                <param name="enableErrorDialogs" value="-1" />
                <param name="SAMIStyle" value="" />
                <param name="SAMILang" value="" />
                <param name="SAMIFilename" value="" />
                
            </object>
我在网页中引用了播发器，能显示，能连续播放，但是下一首的按钮始终为灰色不可选择，是什么原因呢？

Answer 1

<param name="enabled" value="-1">