Failed to deploy the workflow template to Microsoft Office SharePo

[Dee]

I have started to get this message when I deploy a Workflow from Visual
Studio 2008.
Failed to associate this workflow template with a Microsoft Office
SharePoint list. Object reference not set to an instance of an object.
Failed to deploy the workflow template to Microsoft Office SharePoint Server

VMWARE virtual server

Microsoft Windows Server 2003 Enterprise Edition SP2
Intel Xeon CPU
E7330 @ 2.40 GHz
2.00 GB of RAM

.Net Framework 2. SP2
.Net Framework 3. SP2
.Net Framework 3.5 SP1

WSS 3.0 Service Pack 3.0
MOSS 2007 Service Pack 2.0

[Ajit]

Hi,

We are using SharePoint server 2007 in Windows 2008 Server 64 bit.
I am trying to delete the 'unnecessary' web parts from the gallery. We have
a console application which creates an SPSite object pointing
to the root site, calls

rootSite.GetCatalog(SPListTemplateType.WebPartCatalog);

to return the SPList of web parts in gallery and calls the delete on
those individual web parts. The program runs fine, I can see that the deleted
web parts are no longer listed in the Add Web Parts --Web Page Dialog. But
when I click the Advanced Web Part Gallery and Options, "Add Web Part" pane
come up. In this pane there are three web part collections: Closed Web Parts,
Home Gallery and Server Gallery. Interesting thing is all the web parts,
including the deleted
one can be added from the Home Gallery. Why is it so ?

I did a reset of IIS after running the program.
Is there anything that I am missing.

With Regards
Ajit