jacob总是报错“com.jacob.com.ComFailException: Can't co-create object”

我用jacob打开word文件，程序已写好。发现每次都是开机后运行程序，就能正常的运行打开word进行操作。可如果等30分钟不操作，再运行程序，就报错“com.jacob.com.ComFailException: Can't co-create object ”，如果此时重启系统，就又可以正常运行了，再等30分钟不动他，又会出现同样问题。奇怪啊，难道30分钟，程序和系统有什么变化么？我的环境：windows2003 x86 + tomcat5.5 + jdk1.5
分不多了，请包涵
错误详细信息如下：

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: Can't co-create object
org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:515)
org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:419)
root cause

com.jacob.com.ComFailException: Can't co-create object
com.jacob.com.Dispatch.createInstanceNative(Native Method)
com.jacob.com.Dispatch.<init>(Dispatch.java:101)
com.jacob.activeX.ActiveXComponent.<init>(ActiveXComponent.java:58)
com.csgrc.comm.WordBean.<init>(WordBean.java:30)
com.csgrc.action.StandardEstablishAction.standardEstablishToWord(StandardEstablishAction.java:7496)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
java.lang.reflect.Method.invoke(Method.java:585)
com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:404)
com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:267)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:229)
com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:221)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:150) --------------------编程问答-------------------- 我也是遇到这个错误啊。之前我用OPenoffice把word转换成pdf时候，连续N次都没问题，但是等大约20分钟左右就不能转换了。现在我换了jacob转换，转换7次左右就不能创建对象了，报 com.jacob.com.ComFailException: Can't co-create object错误。我检查了代码我要关的东西都关掉了百思不得其解。你解决了吗？QQ490939208 联系讨论下

补充：Java ,  Java EE