set license

I am using java 1.6, Aspsoe-pdf-4.50, Aspose-pd-kit-4.7.0, etc ( Java Total ) and Junit.
I got these error message in Window Only:
ex=java.lang.SecurityException: class "com.aspose.a.a.a"'s signer information does not match signer information of other classes in the same package
    at java.lang.ClassLoader.checkCerts(Unknown Source)
    at java.lang.ClassLoader.preDefineClass(Unknown Source)
    at java.lang.ClassLoader.defineClassCond(Unknown Source)
    at java.lang.ClassLoader.defineClass(Unknown Source)
    at java.security.SecureClassLoader.defineClass(Unknown Source)
    at java.net.URLClassLoader.defineClass(Unknown Source)
    at java.net.URLClassLoader.access$000(Unknown Source)
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at internal.ak.a(Unknown Source)
    at aspose.pdf.a.a(Unknown Source)
    at com.aspose.pdf.License.setLicense(Unknown Source)

Here is the set license code:

String rootFolder = generalService.getSystemRootFolder();
            
            
            if  ( !rootFolder.endsWith("/") ) {
                rootFolder += "/";
            }
            String licFile = rootFolder + "Aspose.Total.Java.lic";
            log.info("licFile="+licFile);
            com.aspose.pdf.License licensePDF = new com.aspose.pdf.License();
            licensePDF.setLicense(licFile);
            
            com.aspose.pdf.kit.License licenseKit = new com.aspose.pdf.kit.License();
            licenseKit.setLicense(licFile);
            
            com.aspose.email.License licenseEmail = new com.aspose.email.License();
            licenseEmail.setLicense(licFile);

            com.aspose.words.License licenseWords = new com.aspose.words.License();
            licenseWords.setLicense(licFile);

            com.aspose.slides.License licensePPT = new com.aspose.slides.License();
            licensePPT.setLicense(licFile);
            
            com.aspose.cells.License licenseExcel = new com.aspose.cells.License();
            licenseExcel.setLicense(licFile);

Thanks,
Chang Shin