Period Converter backtesting

[Forex Trader]

I downloaded the historical data (eg. usdjpy 1m) from alpari and import into alpari metatrader through history center. (i tried not to download the data directly from history center) Everything seems great and I am trying to backtesting now. I am testing on period 30min and after a few times of recalculate without using date, the date that backtested only from october this year. I saw my usdjpy,m30 fxt is only dated from october. My usdjpy30m.hst from july but my usdjpy1m.hst from 2004 june. I read some topic here and some suggest to use period converter to convert the 1m data into 30 min. I tried the period converter at my metatrader with the script, allow dll import, clear dll confirm calls, and extperiodmultiplier 30 on a offline usdjpy1m chart. But nothing happen, my usdjpy30min.hst still the same and the fxt still the same. Some one please help, I think I am missing something here.