Cant update MT4 history 15M data

need help here, i cant get the history data of GBP/USD M15 Interbank Mt4.
i dunno why,usually when i scroll back, it will update itself automatically...
(i mean on other pairs and timeframe).
but in GBP/USD 15min , it somehow stuck at 15 Oct 2006.i cant go behind that date.
i tried to update/download the metaquotes history but it say no data available.
BTW i am using demo account.anyone willing to share his history file? pls tell me what to
do

There is a limit for each time frame how far back the history goes.

Also, you should never mix your broker data with data from MetaQuotes. I know the feature is there, but it isn't really useful.

What you see for the 15min is about right; I'm seeing the same for other pairs.