Who can tell me what I'm doing wrong?

My environment: two machines both running WXP Pro with SP2
Machine A: Visual Studio 2005 Pro AND Visual WEB Developer 2008 Express edition (VWD)
Machine B: only Visual WEB Developer 2008

In Dec 2007 I installed the first time VWD. All was ok on both machines as long as I did NOT use the ReportViewer (.rdlc) - which I understood was missing at that time i.e., e.g., NO ReportViewer control!

Now on Feb28 2008 I (re)installed with the Repair/install option VWD2008 and see the following:

On Machine A (which also runs VS2005) ALL is ok i.e. the ReportViewer Control has been put to the toolbox and all runs fine!

HOWEVER: on Machine B (VWD only) running also the Repair/install option: no reportviewer Control in the toolbox and more frightening it missis e.g. the System.WEB.Extensions version 1.o6...... Of course I can put the System.WEBExtensions.dll and the Microsoft.ReportViewer.....DLLs in my BIN folder and that's ok ...

BUT then I get message:
An unexpected error occurred in Report Processing.
Could not load file or assembly 'Microsoft.ReportViewer.ProcessingObjectModel, Version=8.0.0.0,
Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies.
 
.... I cannot find this assembly/DLL at all?

My questions:
- shouldn't the repair/install option take care of all these business? I wouldn't like to take care of my bin folder manually! for, in my opinion, common business!
- what do I do wrong that it doesn't work the same on both machines?
- where can I find the "Microsoft.ReportViewer.ProcessingObjectModel"
- ... what question do I need to ask?

thanks for your time, hints or clarification
ed