android exception even though the jdom library is there

The jdom library is there and i have removed and added it again and again to the build path. And, i have cleaned the project as well many times. But still iam getting this error:

 04-27 10:51:27.867: W/ActivityThread(530): Application com.pkg.src.nhs.glos is waiting for the debugger on port 8100...
    04-27 10:51:27.936: I/System.out(530): Sending WAIT chunk
    04-27 10:51:29.396: I/dalvikvm(530): Debugger is active
    04-27 10:51:29.736: I/System.out(530): Debugger has connected
    04-27 10:51:29.746: I/System.out(530): waiting for debugger to settle...
    04-27 10:51:29.996: I/System.out(530): waiting for debugger to settle...
    04-27 10:51:30.262: I/System.out(530): waiting for debugger to settle...
    04-27 10:51:30.479: I/System.out(530): waiting for debugger to settle...
    04-27 10:51:30.689: I/System.out(530): waiting for debugger to settle...
    04-27 10:51:30.896: I/System.out(530): waiting for debugger to settle...
    04-27 10:51:43.786: D/dalvikvm(553): GC freed 683 objects / 60040 bytes in 110ms
    04-27 10:51:49.396: W/dalvikvm(553): VFY: unable to find class referenced in signature (Lcom/androidquery/AQuery;)
    04-27 10:51:49.576: W/dalvikvm(553): VFY: unable to find class referenced in signature (Lcom/androidquery/util/XmlDom;)
    04-27 10:51:49.646: W/dalvikvm(553): VFY: unable to find class referenced in signature (Lcom/androidquery/callback/AjaxStatus;)
    04-27 10:51:49.646: I/dalvikvm(553): Could not find method com.androidquery.util.XmlDom.tags, referenced from method com.pkg.src.nhs.glos.MainActivity.setImageCallBack
    04-27 10:51:49.646: W/dalvikvm(553): VFY: unable to resolve virtual method 80: Lcom/androidquery/util/XmlDom;.tags (Ljava/lang/String;)Ljava/util/List;
    04-27 10:51:49.646: D/dalvikvm(553): VFY: replacing opcode 0x6e at 0x0013
    04-27 10:51:49.646: D/dalvikvm(553): Making a copy of Lcom/pkg/src/nhs/glos/MainActivity;.setImageCallBack code (200 bytes)
    04-27 10:51:50.126: E/dalvikvm(553): Could not find class 'org.jdom.input.SAXBuilder', referenced from method com.pkg.src.nhs.glos.MainActivity$SetImageTask.doInBackground
    04-27 10:51:50.126: W/dalvikvm(553): VFY: unable to resolve new-instance 166 (Lorg/jdom/input/SAXBuilder;) in Lcom/pkg/src/nhs/glos/MainActivity$SetImageTask;
    04-27 10:51:50.126: D/dalvikvm(553): VFY: replacing opcode 0x22 at 0x0009
    04-27 10:51:50.126: D/dalvikvm(553): Making a copy of Lcom/pkg/src/nhs/glos/MainActivity$SetImageTask;.doInBackground code (205 bytes)
    04-27 10:51:50.736: W/dalvikvm(553): threadid=15: thread exiting with uncaught exception (group=0x4001b188)
    04-27 10:51:50.746: E/AndroidRuntime(553): Uncaught handler: thread AsyncTask #1 exiting due to uncaught exception
    04-27 10:51:50.846: E/AndroidRuntime(553): java.lang.RuntimeException: An error occured while executing doInBackground()
    04-27 10:51:50.846: E/AndroidRuntime(553):  at android.os.AsyncTask$3.done(AsyncTask.java:200)
    04-27 10:51:50.846: E/AndroidRuntime(553):  at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
    04-27 10:51:50.846: E/AndroidRuntime(553):  at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
    04-27 10:51:50.846: E/AndroidRuntime(553):  at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
    04-27 10:51:50.846: E/AndroidRuntime(553):  at java.util.concurrent.FutureTask.run(FutureTask.java:137)
    04-27 10:51:50.846: E/AndroidRuntime(553):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068)
    04-27 10:51:50.846: E/AndroidRuntime(553):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561)
    04-27 10:51:50.846: E/AndroidRuntime(553):  at java.lang.Thread.run(Thread.java:1096)
    04-27 10:51:50.846: E/AndroidRuntime(553): Caused by: java.lang.NoClassDefFoundError: org.jdom.input.SAXBuilder
    04-27 10:51:50.846: E/AndroidRuntime(553):  at com.pkg.src.nhs.glos.MainActivity$SetImageTask.doInBackground(MainActivity.java:100)
    04-27 10:51:50.846: E/AndroidRuntime(553):  at com.pkg.src.nhs.glos.MainActivity$SetImageTask.doInBackground(MainActivity.java:1)
    04-27 10:51:50.846: E/AndroidRuntime(553):  at android.os.AsyncTask$2.call(AsyncTask.java:185)
    04-27 10:51:50.846: E/AndroidRuntime(553):  at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
    04-27 10:51:50.846: E/AndroidRuntime(553):  ... 4 more
    04-27 10:51:50.941: I/dalvikvm(553): threadid=7: reacting to signal 3
    04-27 10:51:50.941: E/dalvikvm(553): Unable to open stack trace file '/data/anr/traces.txt': Permission denied
    04-27 10:52:02.038: I/Process(553): Sending signal. PID: 553 SIG: 9

Check if the jdom library is checked in the Order and Export Tab of your build path Settings. If it is not check it, do a clean and retry to run your application.