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java.lang.VerifyError: net/sourceforge/jtds/jdbc/TdsCore	at net.sourceforge.jtds.jdbc.JtdsConnection.(JtdsConnection.java:359)	at net.sourceforge.jtds.jdbc.Driver.connect(Driver.java:184)	at java.sql.DriverManager.getConnection(DriverManager.java:179)	at java.sql.DriverManager.getConnection(DriverManager.java:144)	at com.verimbt.elmacafeplus.SignupActivity.connectionclass(SignupActivity.java:244)	at com.verimbt.elmacafeplus.SignupActivity$RegisterLogin.doInBackground(SignupActivity.java:184)	at com.verimbt.elmacafeplus.SignupActivity$RegisterLogin.doInBackground(SignupActivity.java:144)	at android.os.AsyncTask$2.call(AsyncTask.java:287)	at java.util.concurrent.FutureTask.run(FutureTask.java:234)	at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)	at java.lang.Thread.run(Thread.java:841)