Not able to run from Testng.xml but it can run from pom.xml

When I am running my appium code from testng.xml ,I am getting the following output . But when I tried with pom.xml it is working fine . Can any one help me why I am getting following error and how to fix it . ???[I needs to take data from excel file using jxl and run using data provider ,don’t know why it is not running with testng.xml.The same testng.xml used in pom.xml]

[Error] java.lang.NoSuchMethodError: jxl.Sheet.findCell(Ljava/lang/String;IIIIZ)Ljxl/Cell;
at com.kkrusa.instavoice.util.XlsTestDataReader.getTableArray(XlsTestDataReader.java:21)
at com.kkrusa.instavoice.tests.LoginTest.getLoginData(LoginTest.java:413)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:104)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:55)
at org.testng.internal.MethodInvocationHelper.invokeMethodNoCheckedException(MethodInvocationHelper.java:45)
at org.testng.internal.MethodInvocationHelper.invokeDataProvider(MethodInvocationHelper.java:111)
at org.testng.internal.Parameters.handleParameters(Parameters.java:509)
at org.testng.internal.Invoker.handleParameters(Invoker.java:1251)
at org.testng.internal.Invoker.createParameters(Invoker.java:979)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1069)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:128)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:112)
at org.testng.TestRunner.privateRun(TestRunner.java:753)
at org.testng.TestRunner.run(TestRunner.java:607)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:387)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:382)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:340)
at org.testng.SuiteRunner.run(SuiteRunner.java:289)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1293)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1218)
at org.testng.TestNG.runSuites(TestNG.java:1133)
at org.testng.TestNG.run(TestNG.java:1104)
at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:132)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:236)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:81)

Got the solution … issue is because while running from TestNG.xml it was using one jxl API and for POM it was another version jxl API . downloaded both via POM .deleted one it is working