Sqlite Database not inserted Using Script in Proguard Build

I have to display some data from database even after un-install the app. For that I am writing script for that insert operations. And at Re-installation I am executing that script saved on sdcard with db.execSQL(toExec); statement. Using following code snipt

//write code to execute script from file 
                        SQLiteDatabase db = helper.getWritableDatabase();
                        BufferedReader reader = null;
                        try {
                            reader = new BufferedReader(new FileReader(Constants.DIR_PATH+"/"+Constants.SCRIPT_FILE_NAME));
                            String line;
                            while((line = reader.readLine())!=null)
                            {
                                line.trim();
                                AppLog.d(TAG, "Execute script with line: "+line);
                                try
                                {
                                    db.execSQL(line);
                                }
                                catch(SQLiteException e)
                                {
                                    AppLog.d(TAG, "Sqlite Excp with Line: "+line+e);
                                }
                            }
                        } catch (FileNotFoundException e1) {
                            // TODO Auto-generated catch block
                            AppLog.d(TAG, "File Not Found to execute Script"+e1);
                        }
                        catch (IOException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }

This works fine in normal build. But insertion is not done in Proguard build.

I can not figure out what is happening.

Please help...