UK Full postcode support

Hi All,
I updated my go910, with Europe_West_970_7466. But for some reason, cant enter full post code. For example, for post code ME4 6RB, it recognizes
till ME4. It makes it impossible to choose the street name and house number. Can somebody please help. Following are my configuration.

ttgo.bif:
DeviceName=TomTom GO 910
DeviceVersionHW=GO 910
DeviceSerialNumber=V7xxxxxxxxxx
BootLoaderVersion=55120
ApplicationVersionVersionNumber=9510
ApplicationVersion=1234792.1
CurrentMap=Europe_West_970_7466
CurrentMapVersion=970.7466

Map(s):
G:\Europe_West_970_7466\

Many Thanks,
Andrea