I just bought a new book from Kobo site (no previous problems). I can read it on my computer but although it is showing on my ereader as being on there and I can press on the title, when I try to start reading it I get the message (with a large exclamation mark inside a triangle) "Page Error!". I have tried deleting and reloading this numerous times and it doesn't help. Anyone else have this problem and/or know what to do? Thanks in advance!