android创建数据库表问题不能解决！！求大神帮忙

最近在编写关于成绩录入的一个程序，需要在一个数据库myTest.db里创建两个表，一个是学生信息表t_users，另一个是学生成绩表t_cj，学生需要根据学生信息表进行登陆，教师将成绩录入学生成绩表。但是程序总有问题，将成绩输入好单击保存就是停止运行，想请大神帮帮忙，看问题出在哪！

下面程序是DBHelper.java程序，创建数据库和两个表的程序
package com.bdu.managesys;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.util.Log;

public class DBHelper extends SQLiteOpenHelper{
private static final int DB_VERSION =6;
private static final String TAG=“DBHelper”;
private static final String DB_NAME =“myTest.db”;
private static final String TABLE_NAME =“t_users”;
private static final String TABLE_NAME1 =“t_cj”;
public DBHelper(Context context, String name, CursorFactory factory, int version)
{
super(context, name, factory, version);
}

public DBHelper(Context context){
	this(context,DB_NAME,null,DB_VERSION);
}



@Override
public void onCreate(SQLiteDatabase db) {
	// TODO Auto-generated method stub
	Log.v(TAG, "onCreate");
	db.execSQL( "Create Table If Not Exists " + 
	TABLE_NAME +
			"(id text Primary Key,"//id
			+ " userName text,"//用户名
			+ " passWord text,"//密码
			+ " userNum text,"//学号
			+ " className text,"//班级名称
			+ " userType text"//用户类型0是教师，1是学生。
			+ ")");
	
	db.execSQL( "Create Table If Not Exists " + 
			TABLE_NAME1 +
					"(id text Primary Key,"//id
					+ " userName text,"//用户名
					+ " userNum text,"//学号
					+ " className text,"//班级名称
					+ " math text"//数学成绩。
					+ " chinese text"//语文成绩。
					+ " english text"//英语成绩。
					+ ")");
}
@Override
public void onUpgrade(SQLiteDatabase db, 
		int oldVersion, int newVersion) {
    Log.v(TAG, "onUpgrade");
}

}
下面是成绩录入CjActivity.java的程序：
package com.bdu.managesys;

import java.io.Serializable;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.HashSet;

import android.app.Activity;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import student.Student;
import studentdbhelper.StudentDBHelper;
import tablecontanst.TableContanst;
import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.TextView;
import android.widget.Toast;
public class CjActivity extends Activity implements OnClickListener {
private TextView idText;
private EditText nameText;
private EditText xuehaoText;
private EditText banjiText;
private EditText mathText;
private EditText chineseText;
private EditText englishText;
private Button restoreButton;
private String sex;
private EditText dataText;
private Button resetButton;
private DBHelper dbh;
private SQLiteDatabase sqldb;
private SQLiteDatabase db;
private Context ctx;
private Intent intent;

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.cj_layout);
    resetButton = (Button) findViewById(R.id.btn_clear);

    resetButton.setOnClickListener(new OnClickListener() { 

	public void onClick(View v) {

	finish();//这个是关键

	}

	});
	initView();

    dbh = new DBHelper(this);
	sqldb= dbh.getWritableDatabase();
}
public void initView(){
    idText = (TextView) findViewById(R.id.tv_stu_id);
    nameText = (EditText) findViewById(R.id.et_name);
    xuehaoText = (EditText) findViewById(R.id.et_xuehao);
    banjiText = (EditText) findViewById(R.id.et_banji);
    mathText = (EditText) findViewById(R.id.et_math);
    chineseText = (EditText) findViewById(R.id.et_chinese);
    englishText = (EditText) findViewById(R.id.et_english);
    restoreButton = (Button) findViewById(R.id.btn_save);
    resetButton = (Button) findViewById(R.id.btn_clear);
} 
	public void bc(View v) {
		//bc是保存按钮的onClick方法
		String userName = nameText.getText().toString();
		String xuehao = xuehaoText.getText().toString();
		String banji =banjiText.getText().toString();
		String math = mathText.getText().toString();
		String chinese = chineseText.getText().toString();
		String english = englishText.getText().toString();
		Date d = new Date();
		long id = d.getTime();
		String sql = "Insert Into t_cj"
				+ "(id,userName,userNum,className,math,chinese,english) "
				+ "values("+id+",'"+userName+"','"+xuehao+"',"
						+ "'"+banji+"','"+math+"','"+chinese+"','"+english+"')";

		sqldb.execSQL(sql.toString());
		Log.e("sql语句", sql);
		
		Toast.makeText(this,"录入成功", Toast.LENGTH_LONG).show();
		
	        sqldb.close();//关闭数据库对象
}
	@Override
	public void onClick(View arg0) {
		// TODO Auto-generated method stub
		
	}

}


奇怪的是我的t_cj表的字段是有残缺的，而且myTest.db数据库里只显示t_cj一个表。