Android Question optimized dex error with admob

#Region Module Attributes
    #FullScreen: False
    #IncludeTitle: True
    #ApplicationLabel: 
    #VersionCode: 9
    #VersionName: E
    #SupportedOrientations: portrait
    #CanInstallToExternalStorage: False
        #AdditionalRes: F:\Android\android-sdk\extras\google\google_play_services\libproject\google-play-services_lib\res, com.google.android.gms
    #AdditionalJar: android-support-v4
   #ExcludeClasses: com.google.ads, anywheresoftware.b4a.phone.RingtoneManager
#End Region

'This code will be applied to the manifest file during compilation.
'You do not need to modify it in most cases.
'See this link for for more information: http://www.b4x.com/forum/showthread.php?p=78136
AddManifestText(
<uses-sdk android:minSdkVersion="4" android:targetSdkVersion="21" />
<supports-screens android:largeScreens="true"
android:normalScreens="true"
android:smallScreens="true"
android:anyDensity="true"/>
)
SetApplicationAttribute(android:icon, "@drawable/icon")
SetApplicationAttribute(android:label, "$LABEL$")
'AdMob
AddApplicationText(
<meta-data android:name="com.google.android.gms.version"
android:value="@Integer/google_play_services_version"/>
<activity android:name="com.google.android.gms.ads.AdActivity"
android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"/>

)
'End of AdMob
'End of default text.

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Installing file.
PackageAdded: package:xxxx.xxxx.xxx
Copying updated assets files (4)
** Activity (main) Create, isFirst = true **
java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/ads/mediation/admob/AdMobAdapter;
at com.google.android.gms.ads.internal.client.zzh.zza(Unknown Source)
at com.google.android.gms.ads.internal.client.zzab.zza(Unknown Source)
at com.google.android.gms.ads.BaseAdView.loadAd(Unknown Source)
at com.google.android.gms.ads.AdView.loadAd(Unknown Source)
at anywheresoftware.b4a.admobwrapper.AdViewWrapper.LoadAd(AdViewWrapper.java:118)
at Dardiries.mukhtar.abmegeed.main._activity_create(main.java:430)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:708)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:340)
at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:247)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:134)
at Dardiries.mukhtar.abmegeed.main.afterFirstLayout(main.java:102)
at Dardiries.mukhtar.abmegeed.main.access$000(main.java:17)
at Dardiries.mukhtar.abmegeed.main$WaitForLayout.run(main.java:80)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:158)

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B4A version: 6.30
Parsing code. (0.02s)
Compiling code. (0.28s)
Compiling layouts code. (0.01s)
Organizing libraries. (0.02s)
Generating R file. (2.45s)
Compiling generated Java code. (2.71s)
Convert byte code - optimized dex. (147.34s)
Optimized dexer failed. Switching to Standard dexer.
Packaging files. (20.36s)
Copying libraries resources (0.00s)
Signing package file (private key) (6.10s)
ZipAlign file. (0.18s)
Installing file to device. (0.25s)
Installing with B4A-Bridge.
Completed successfully.

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