Whats wrong with this code. I found logoical error in db.insert(helper.TABLE_PRODUCT,null,cv)

public void addInfo()
    {
        // add the new data to the db

        helper.getWritableDatabase();
        ContentValues cv = new ContentValues();
        cv.put(ed1.getText().toString(), category);
        cv.put(ed2.getText().toString(),shape);
        cv.put(ed3.getText().toString(),prise);
        db.insert(helper.TABLE_PRODUCT,null,cv);
        Toast.makeText(getApplicationContext(),"Data Successfully Entered",Toast.LENGTH_LONG).show();
        db.close();
    }