target JVM seems to have already exite

今天在测试applet的时候，突然出现一个target JVM seems to have already exite 的错，一直没法解决，求大神出手！！

<applet codebase="../saomiao/"
									code="com.dekey.scan.applet.ui.AppletScanTable.class"
									ARCHIVE="applet4scan.jar" name="AppletScanTable" width="100%"
									height="400" hspace="0" vspace="0" align="middle">
								<PARAM NAME="localPath" VALUE='${localPath}'>
								<PARAM NAME="filePostfix" VALUE='${filePostfix}'>
								<PARAM NAME="imageTypes" VALUE='${imageTypes}'>
								<PARAM NAME="picnum" VALUE='8'>
								<PARAM NAME="scanModel" VALUE='${scanModel}'>
								<PARAM NAME="hasType" VALUE='${hasType}'>					
								<PARAM NAME="localTemp" VALUE="${localTemp}">
								<PARAM NAME="yuf002" VALUE='${yuf002}'>
</applet>

下面JS调用代码，随便调applet的某一个方法都报这个错:

document.applets["AppletScanTable"].initJTable(null);

大神快到碗里来吧!

还有人研究 applet。。。。。