Help with application and Android Studio

I made an application, and now I have changed the minSdkVersion to run on previous android versions. So when installing the same in the emulator it works normally, but when installing on the phone it gives me the following message:

  

Application stopped.

I made these settings

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.3"
    defaultConfig {
        applicationId "br.com.flextelecom.barbacena"
        minSdkVersion 10
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    productFlavors {
    }
}

dependencies {
    compile files('libs/jtds-1.3.1.jar')
    compile 'com.android.support:appcompat-v7:23.4.0'
    compile 'com.android.support:design:23.4.0'
    testCompile 'junit:junit:4.12'
}

Version 2.3 looks like Asynctask does not spin

08-01 12:36:36.889 1149-1997/br.com.flextelecom.barbacena E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #1
java.lang.RuntimeException: An error occured while executing doInBackground()
 at android.os.AsyncTask$3.done(AsyncTask.java:200)
 at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:274)
 at java.util.concurrent.FutureTask.setException(FutureTask.java:125)
 at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:308)
 at java.util.concurrent.FutureTask.run(FutureTask.java:138)
 at      java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
 at java.lang.Thread.run(Thread.java:1019)
 Caused by: java.lang.VerifyError: net.sourceforge.jtds.jdbc.TdsCore
   at net.sourceforge.jtds.jdbc.JtdsConnection.<init>(JtdsConnection.java:359)
   at net.sourceforge.jtds.jdbc.Driver.connect(Driver.java:184)
   at java.sql.DriverManager.getConnection(DriverManager.java:180)
   at java.sql.DriverManager.getConnection(DriverManager.java:145)
   at br.com.flextelecom.barbacena.Conexoes_Banco.ConexaoDao.dbConnect(ConexaoDao.java:31)
   at br.com.flextelecom.barbacena.Conexoes_Banco.DaoCaptRioMortes.nomeTabela(DaoCaptRioMortes.java:55)
   at br.com.flextelecom.barbacena.Actions_Main.Act_Capt_RioMortes$MinhaTask.doInBackground(Act_Capt_RioMortes.java:237)
   at br.com.flextelecom.barbacena.Actions_Main.Act_Capt_RioMortes$MinhaTask.doInBackground(Act_Capt_RioMortes.java:188)
   at android.os.AsyncTask$2.call(AsyncTask.java:185)
   at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306)
   at java.util.concurrent.FutureTask.run(FutureTask.java:138) 
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088) 
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581) 
   at java.lang.Thread.run(Thread.java:1019)