Site Manager 'usual' Error

I am using Windows XP professional
I am using  the CMS 2002 with sp1 trial download software

I have followed installation as in the 'Building Websites with Microsoft 
Content Management Server' by Lim Ying, Joel Ward, Stefan Gossner.

So far I have managed to install CMS.
I have run the DCA.

I have tried to use the Site Manager to connect to the localhost:80.

I get a 'typical' error:
'Could not connect to the Microsoft Content Server localhost:80'

I have read the FAQs at:
http://download.microsoft.com/download/4/2/5/4250f79a-c3a1-4003-9272-2404e92bb76a/MCMS+2002+-+(complete)+FAQ.htm#HL_E5141EB8-A8CE-4B94-B2CA-5ADC4DDF3D78

and I have got as far as point 5 of the relevant 'answer':
'Try to access http://localhost:80/NR/System/ClientUI/login.asp
from 
Microsoft Internet Explorer and see if you get an error from Microsoft 
Internet Information Server (IIS). If so, put a test (very simple one;
e.g. 
just say “hello world�) ASP page in \Server\IIS_NR\System\ClientUI\
and try 
to access it from Microsoft Internet Explorer. If that test page gives the

same error, work on the issue as a regular IIS access problem. Then try to

open Site Manager again.'

......now at this point, IE re****ts the following error:

Error Type:
Server object, ASP 0177 (0x800401F3)
Invalid class string 
/NR/System/ClientUI/login.asp, line 9


...... and if I look at line 9:

Set AESession = Server.CreateObject("AeSession.AeSession.1")


..... to which I have found a post that recommends:

'Please reregister the following COM object using regsvr32:
c:\Program Files\Microsoft Content Management
Server\Server\bin\AEServerObject.dll"'

So I tried that but the register fails:

'DllRegisterServer in C:\....bin\AEServerObject.dll failed Return code
was: 
0x80070005'

I have tried to 'repair' the original installation from the control panel
- 
add remove programs, but it makes no difference. 

(By the way I have 3 J# redistributables on my machine....j# .NET 
Redistributable Package 1.1/(ENU) v1.0.4205/2.0 )

I have spent so long trying to install this, and I'm not having any
success. 
Please help.