Error loading plugin class com.smartbear.mqttsupport.PluginConfig

Hello,

 Getting the following exception, while intigrating soapUI 5.2.0 with TestNg.

com.eviware.soapui.plugins.InvalidPluginException: Error loading plugin class com.smartbear.mqttsupport.PluginConfig
at com.eviware.soapui.plugins.PluginLoader.loadPlugin(PluginLoader.java:102)
at com.eviware.soapui.plugins.PluginLoader.loadPlugin(PluginLoader.java:42)
at com.eviware.soapui.plugins.PluginManager.doInstallPlugin(PluginManager.java:127)
at com.eviware.soapui.plugins.PluginManager.access$600(PluginManager.java:38)
at com.eviware.soapui.plugins.PluginManager$LoadPluginsTask.computeSequentially(PluginManager.java:406)
at com.eviware.soapui.plugins.PluginManager$LoadPluginsTask.compute(PluginManager.java:363)
at com.eviware.soapui.plugins.PluginManager$LoadPluginsTask.compute(PluginManager.java:368)
at com.eviware.soapui.plugins.PluginManager$LoadPluginsTask.compute(PluginManager.java:351)
at java.util.concurrent.RecursiveTask.exec(Unknown Source)
at java.util.concurrent.ForkJoinTask.doExec(Unknown Source)
at java.util.concurrent.ForkJoinWorkerThread.execTask(Unknown Source)
at java.util.concurrent.ForkJoinPool.scan(Unknown Source)
at java.util.concurrent.ForkJoinPool.work(Unknown Source)
at java.util.concurrent.ForkJoinWorkerThread.run(Unknown Source)
Caused by: java.lang.NoClassDefFoundError: org/reflections/adapters/JavaReflectionAdapter
at java.lang.ClassLoader.defineClass1(Native Method)
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$100(Unknown Source)
at java.net.URLClassLoader$1.run(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 java.lang.Class.getDeclaringClass0(Native Method)
at java.lang.Class.getDeclaringClass(Unknown Source)
at java.lang.Class.getEnclosingClass(Unknown Source)
at java.lang.Class.getSimpleBinaryName(Unknown Source)
at java.lang.Class.getSimpleName(Unknown Source)
at org.reflections.Reflections.<init>(Reflections.java:91)
at com.eviware.soapui.plugins.LoaderBase.loadAutoFactories(LoaderBase.java:90)
at com.eviware.soapui.plugins.LoaderBase.loadFactories(LoaderBase.java:64)

 Please give me suggestions regarding this.

 Thanks in advance.

 Naveen