following error occured during sending email. please help me

			
				

				java.lang.VerifyError: (class: javax/activation/MimeType, method: setSubType
				

				signature: (Ljava/lang/String;)V) Unable to pop operand off an empty stack
				

				at javax.activation.DataHandler.getBaseType(DataHandler.java:602)
				

				at javax.activation.DataHandler.getDataContentHandler(DataHandler.java:568)
				

				at javax.activation.DataHandler.writeTo(DataHandler.java:304)
				

				at javax.mail.internet.MimeUtility.getEncoding(MimeUtility.java:181)
				

				at javax.mail.internet.MimeBodyPart.updateHeaders(MimeBodyPart.java:987)
				

				at javax.mail.internet.MimeMessage.updateHeaders(MimeMessage.java:1617)
				

				at javax.mail.internet.MimeMessage.saveChanges(MimeMessage.java:1598)
				

				at javax.mail.Transport.send(Transport.java:79)
				

				at com.shopping.beans.MailBean.send(MailBean.java:66)
				

				at com.shopping.tags.QueryFormTag.doStartTag(QueryFormTag.java:96)
				

				at _submitdesignqry__jsp._jspService(/home/sites/www.buysellitems.com/web/submitdesignqry.jsp:23)
				

				at com.caucho.jsp.JavaPage.service(JavaPage.java:74)
				

				at com.caucho.jsp.Page.subservice(Page.java:485)
				

				at com.caucho.server.http.FilterChainPage.doFilter(FilterChainPage.java:176)
				

				at com.caucho.server.http.Invocation.service(Invocation.java:278)
				

				at com.caucho.server.http.CacheInvocation.service(CacheInvocation.java:129)
				

				at com.caucho.server.http.RunnerRequest.handleRequest(RunnerRequest.java:338)
				

				at com.caucho.server.http.RunnerRequest.handleConnection(RunnerRequest.java:270)
				

				at com.caucho.server.TcpConnection.run(TcpConnection.java:140)
				

				at java.lang.Thread.run(Thread.java:484)