Hi Sean Pirie.
I used to get logged out every so-often as well. For some reason this problem has gone on its own...
Couple of suggestions:
1) Try changing your MSN server, a program called MSN Servers should do the trick and you can get that here >
http://www.kaonet.net/page.php?id=80 Make a note of your original MSN server so you can change back to it in the unlikely event that you get problems.
2) For the "constantly having to enter my details" problem, you could try and see if you have enabled cookies. If they are disabled, enable them and see if it saves your details.
3) When you enter your details, do you click the "Sign me in automatically" box? This saves your details so all you have to do is click the sign in button next time you log in. (Might sound a bit stupid but i decided to mention it anyways
)
Let me know if any of these steps help,
Frankiedaman