Edit : oops, i just saw that you had the reader app already installed. What about digital editions ?
https://www.mobileread.com/forums/sho...d.php?t=154200
Before anything, you need create an adobe account, authorized the T1 with it, and use ADE (after authorizing it to that account) to get the book. If ade is installed, the reader app will get the info from the ADE installation. If not, i have no clue.
First, if you havn't already, install Adobe digital editions.
http://www.adobe.com/products/digitaleditions/
Then, create an adobe account (if you don't have one), and authorize digital edition with it.
Get the sony reader app and install it.
http://ebookstore.sony.com/download/
Plug T1 to PC, start Sony reader, authorize T1.
There should be a "download" link on the kobo web site. That should get a ".ascm" file.
Download it (using save as) .
Right clic on the .ascm file, open with / digital edition (Not the sony app).
Then, copy past to get the book on the reader.
And finally, read