conection problem on office 2003/instalation problem with beta 200

Hi there

As of yesterday my outlook 2003 went pear-shape. I added some new accounts
to it in the afteroon, but after realizing that I got given wrong "user
names" had to remove them as they were causing problems ( during send/receive
pop window kept coming up asking for user name and password). I thought that
the easiest thing to do would be to remove all new accounts and thats what I
did.
Dont know if that had any impact on the original account I had set up on
outlook, but since that operation outlook stopped working alltogether, it
doesnt sent nor receive absolutely nothing.
The original account was set up on POP3 server, I have checked all the
settings and there is an eror that keeps coming up saying that Outlook cannot
conect to POP3 as well as SMTP. Interesting thing is that I have not touched
any settings on that acount while I was adding/removing the other accounts.
Since than, I have removed that account completely and added it on again, I
have reinstalled whole microsoft office and nothing helps. On the contrary,
all other accounts in my firm that are using this server are working
perfectly fine, so it cant be the server fault.
I have even tried to set up this account on the spare laptop I got ( which
connect to the net via same network I got my PC hooked up to) and that didnt
work either, same error messages keep appearing.
Any idea what could cause all those problems??

Changing the subject,

After all the experiences I mentioned above I decided to give a go to new
2007 beta office.

I have downloaded Microsoft® Windows SharePoint Services
Microsoft® Office SharePoint® Designer 2007
Microsoft® Office OneNote® 2007
Microsoft® Office Project Professional 2007
Microsoft® Office Outlook® 2007 with Business Contact Manager
Microsoft® Office Visio® Professional 2007
Microsoft® Office Professional Plus 2007

The installation faild about half way through on Office professional with
error message 2350 (if I remember correctly) and the only option I had was to
remove it all. I ve tried it few times, every time with same result.
Thinking that maybe for some reason dowloaded file was incompleted/damaged,
I downloaded it again. This time installation wizard failed alltogether, I
removed the set up file and downloaded it yet again (440MB each time) with
the same result, set up faild before it even started.

Any idea why is this happening?