PRS-505 help would be appreciated

I am not sure if anyone can help me here.

I have just bought another Sony prs-505 (I just love them and also the lrf format that everyone seems to hate). This looked just fine when I got it with a few books loaded which worked properly.

I connected to my laptop and the charging light came on but the reader screen froze instead of showing the 'connected' logo, and the charging icon by the battery didn't show. I also loaded Calibre and it was recognised so I copied some books over but when I disconnected it the reader had frozen and I had to do a reset. Once done the books had transferred correctly. Tried this a few times but each time the same problem.

I am not sure if there is something I can do to fix the transfer process.