OFF topic IIS 5.0 remote machines have problems connection to www service , but not ftp service

Hi all,

I am in the process of setting up iss5.0 as supplied with
win2k professional to work with a dial up 56k modem connection.

The ISP I am using allows free telephone calls, but disconnect you after 2h
on line or five minutes idle time.

My ISP dynamically allocates an IP address and as a result I use software
from tzo.ccom to give me a fixed address.
i.e. dynamic to fixed IP address conversion / dns entry

Zone Alarm is also installed on the server and I allowed ftp and IIS service
server status

NB All connections at work go through ms proxy 2.0

The problem I having is that when I access the server from a machine a work
using a different ISP I find

ftp://www.rowanclose.tzo.com/rowanclose/index.html
always works, but

http://www.rowanclose.tzo.com/rowanclose/index.html

inevitably fails with

10061 Connection refused

being reported by Microsoft proxy server v2.0

Occasionally I am successfully able to connect to the page and have seen the
problem occurring on colleges machines who try to access the server.

what Can I do to resolve this problem ?
Please reply via my work email id

Thanks

Robert Fernando
Tel: +44 (0)709 203 3685
Fax: +44 (0) 870 133 1992
work Email: xxxxx@anitetelecoms.com
personal email xxxxx@bigfoot.com
NB only read at home.
Personal views not necessarily those of
Anite Telecoms Limited Registered in England No. 1721900 Registered
Office: 100 Longwater Avenue, GreenPark, Reading, Berkshire RG2 6GP,
United Kingdom