解决办法如下(此办法是网上其他地方提出的，使用后果然可以解决以上问题)：
?在index.template.html中更改一个属性，index.template.html在你的flex工程下，目录为 ：工程名html-templateindex.template.html。打开后，查看window的属性"wmode"，看到后，将其值更改为"transparent"。一般一共会有三个地方。更改完后保存，重新编译，启动工程，成功！
???????? 具体的代码如下:（注意红色字体）
<!-- saved from url=(0014)about:internet -->
<html lang="en">
<!--
Smart developers always View Source.
This application was built using Adobe Flex,an open source framework
for building rich Internet applications that get delivered via the
Flash Player or to desktops via Adobe AIR.
Learn more about Flex at http://flex.org
// -->
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<!--? BEGIN Browser History required section -->
<link rel="stylesheet" type="text/css" href="history/history.css" />
<!--? END Browser History required section -->
<title>${title}</title>
<script src="AC_OETags.js" language="javascript"></script>
<!--? BEGIN Browser History required section -->
<script src="history/history.js" language="javascript"></script>
<!--? END Browser History required section -->
<style>
body { margin: 0px; overflow:hidden }
</style>
<script language="JavaScript" type="text/javascript">
<!--
// -----------------------------------------------------------------------------
// Globals
// Major version of Flash required
var requiredMajorVersion = ${version_major};
// Minor version of Flash required
var requiredMinorVersion = ${version_minor};
// Minor version of Flash required
var requiredRevision = ${version_revision};
// -----------------------------------------------------------------------------
// -->
</script>
<script src="../scripts/hello.js" language="javascript"></script>
</head>
<body scroll="no">
<script language="JavaScript" type="text/javascript">
<!--
// Version check for the Flash Player that has the ability to start Player Product Install (6.0r65)
var hasProductInstall = DetectFlashVer(6,65);
// Version check based upon the values defined in globals
var hasRequestedVersion = DetectFlashVer(requiredMajorVersion,requiredMinorVersion,requiredRevision);
if ( hasProductInstall && !hasRequestedVersion ) {
?// DO NOT MODIFY THE FOLLOWING FOUR LINES
?// Location visited after installation is complete if installation is required
?var MMPlayerType = (isIE == true) ? "ActiveX" : "PlugIn";
?var MMredirectURL = window.location;
??? document.title = document.title.slice(0,47) + " - Flash Player Installation";
??? var MMdoctitle = document.title;
?AC_FL_RunContent(
??"src","playerProductInstall",
??"FlashVars","MMredirectURL="+MMredirectURL+'&MMplayerType='+MMPlayerType+'&MMdoctitle='+MMdoctitle+"",
??"width","${width}",
??"height","${height}",
??"align","middle",
??"id","${application}",
??"quality","high",
??"bgcolor","${bgcolor}",
??"name",
??"allowScriptAccess","sameDomain",
??"type","application/x-shockwave-flash",
??"wmode","transparent",?
??"pluginspage","http://www.adobe.com/go/getflashplayer"
?);
} else if (hasRequestedVersion) {
?// if we've detected an acceptable version?? transparent
?// embed the Flash Content SWF when all tests are passed
?AC_FL_RunContent(
???"src","${swf}",
???"width",
???"height",
???"align",
???"id",
???"quality",
???"bgcolor",
???"name",
???"allowScriptAccess",
???"type",
???"wmode",?
???"pluginspage","http://www.adobe.com/go/getflashplayer"
?);
? } else {? // flash is too old or we can't detect the plugin
??? var alternateContent = 'Alternate HTML content should be placed here. '
? ?+ 'This content requires the Adobe Flash Player. '
?? ?+ '<a href=http://www.adobe.com/go/getflash/>Get Flash</a>';
??? document.write(alternateContent);? // insert non-flash content
? }
// -->
</script>
<noscript>
? ?<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"
???id="${application}" width="${width}" height="${height}"
???codebase="http://fpdownload.macromedia.com/get/flashplayer/current/swflash.cab">
???<param name="movie" value="${swf}.swf" />
???<param name="quality" value="high" />
???<param name="bgcolor" value="${bgcolor}" />
???<param name="allowScriptAccess" value="sameDomain" />
???<embed src="${swf}.swf" quality="high" bgcolor="${bgcolor}"
????width="${width}" height="${height}" name="${application}" align="middle"
????play="true"
????loop="false"
????quality="high"
????allowScriptAccess="sameDomain"
????type="application/x-shockwave-flash"
????pluginspage="http://www.adobe.com/go/getflashplayer" wmode="transparent">???</embed>?</object></noscript></body></html>
