no such column name error

I defined column name. but I confront this error. I checked every thing. I cant find the reason of this error .

try { myDB = this.openOrCreateDatabase("DatabaseName", MODE_PRIVATE, null);

     /* Create a Table in the Database. */
     myDB.execSQL("CREATE TABLE IF NOT EXISTS "
       + TableName
       + " (" +
       "name TEXT, " +
       "number TEXT" +
           ");"
       );

     /* Insert data to a Table*/
     myDB.execSQL("INSERT INTO "
       + TableName
       + "(name,number)"
       + " VALUES (name,number)");

    // retrieve data from database
     Cursor c = myDB.rawQuery("SELECT * FROM " + TableName , null);


     // Check if our result was valid.
     c.moveToFirst();


         while(c.moveToNext())
            {
             Log.i("error",c.getString(0));
             Log.i("error",c.getString(1) ); 
         contactname.add(c.getString(c.getColumnIndex("name")));
         contactnumber.add(c.getString(c.getColumnIndex("number")));

          }