can't access ssrs 2005 report server-Collection of common programming errors

when I tried to connect a report server (2005) I got this in management studio:

The underlying connection was closed: An unexpected error occurred on a send. (Microsoft.SqlServer.Management.UI.RSClient)

I couldn’t access the server from IE either. I got these in IE:

This problem can be caused by a variety of issues, including:

•Internet connectivity has been lost.

•The website is temporarily unavailable.

•The Domain Name Server (DNS) is not reachable.

•The Domain Name Server (DNS) does not have a listing for the website’s domain.

•If this is an HTTPS (secure) address, click tools, click Internet Options, click Advanced, and check to be sure the SSL and TLS protocols are enabled under the security section

I have checked all services are running. IIS is running. I used to access it no problem. I guess some guy in the company made something to the server but that guy is on vocation so…

update:

for IE,

http://”XXX”/Reports

got the above mentioned errors in IE

http://”XXX”/ReportServer

works ok.