cant connect to my server

I have a server set up in my office for 10 years and it is networked in within the office. Also it is set up for me to be able to connect to it by webmail and also to connect to see files and all I have on it. It has worked always, I was able to get in when out of town, till last week and on the same computer I have used, a laptop, now it does not let me in. The only change was, I have upgraded the laptop with the new Windows 7. I can still get in on my friend computer from outside the network, however he has Windows XP. I have tried other computers, some I can get in with some I can not. I went to Staples and I can not get in from there either. Does the new Windows have some new security installed preventing me to get in?

Microsoft echange 2003 Outlook web access, can not connect through my web broweser, what I have been doing for years.

I have to ask, what web browser are you using to connect to OWA? And if your Using IE, are you using a different version on Windows 7 compared to the XP machine?

Also if your using IE 8 64 bit on windows 7, use IE 8 32 bit instead.

I have IE 7 on my computers, the one is not working when I want to conect to my server is IE 9 and 64 bit. Thearrear message is Error: Access Denied

I have went back to EI 9 nothing happened, uninstalled all the updates, same think. I have reset all security setings to the lowest, put my server into the trusted sites and all possible changes, no go.