i've just upgraded to bt max and about a week ago the bt availability checker said i could get a speed of up to 2.5meg, i've just checked again and now it's saying i can only get up to 1.5meg, which is about all i'm getting when i check my next door neighbours number it says they can get up to 4meg ,can my line realy be that much worse ,i've had a line check and they said it was fine.