I've installed the blog module on our live site:
http://nfaw.org

but there are a few problems. To sort these out I need to get the blog module working on my development site on my MacBook Pro. Unfortunately the db/build/?flush=1 command fails to run.

I've been running version 2.2.2 happily up to now using the standard Apache 2 install with PHP upgraded to 5.2.5 and the GD2 module installed. (and if that makes it sound as if I know what I'm doing, you've got it wrong.)

The error text follows. Can anyone suggest a fix, or at least identify what the source of the problem is?

thanks
bruce

FATAL ERROR: Bad class to singleton() - BlogEntry
At line 85 in /Users/macbookbruce/silverstripe/sapphire/core/Core.php

user_error(Bad class to singleton() - BlogEntry,256)
line 85 of Core.php

singleton(BlogEntry)
line 175 of DatabaseAdmin.php

DatabaseAdmin->doBuild()
line 90 of DatabaseAdmin.php

DatabaseAdmin->build(Array)
line 261 of Controller.php

Controller->run(Array)
line 104 of Director.php

Director::direct(db/build)
line 158 of main.php

Context

Debug (Debug::showError() in line 180 of Debug.php)

className =
BlogEntry
_SINGLETONS =
Member =
Database record: Member

ID :
0
Newsletter =
Database record: Newsletter

ID :
0
Newsletter_SentRecipient =
Database record: Newsletter_SentRecipient

ID :
0
Newsletter_Recipient =
Database record: Newsletter_Recipient

ID :
0
NewsletterType =
Database record: NewsletterType

ID :
0
PageComment =
Database record: PageComment

ID :
0
Email_BounceRecord =
Database record: Email_BounceRecord

ID :
0
Email_BlackList =
Database record: Email_BlackList

ID :
0
PageView =
Database record: PageView

ID :
0
SiteTree =
Database record: SiteTree

ID :
0
Translatable = Translatable::__set_state(array( 'translatableFields' => array ( 0 => NULL, 1 => true, 2 => NULL, 3 => NULL, 4 => NULL, 5 => NULL, 6 => NULL, 7 => NULL, 8 => NULL, ), 'original_values' => NULL, 'owner' => NULL, 'extension_instances' => array ( ), 'class' => 'Translatable', ))
QueuedEmail =
Database record: QueuedEmail

ID :
0
File =
Database record: File

ID :
0
EditableCheckboxOption =
Database record: EditableCheckboxOption

ID :
0
EditableDropdownOption =
Database record: EditableDropdownOption

ID :
0
EditableFormField =
Database record: EditableFormField

ID :
0
EditableRadioOption =
Database record: EditableRadioOption

ID :
0
SubmittedForm =
Database record: SubmittedForm

ID :
0
SubmittedFormField =
Database record: SubmittedFormField

ID :
0
Group =
Database record: Group

ID :
0
Member_UnsubscribeRecord =
Database record: Member_UnsubscribeRecord

ID :
0
Permission =
Database record: Permission

ID :
0
Widget =
Database record: Widget

ID :
0
WidgetArea =
Database record: WidgetArea

ID :
0
GhostPage =
Database record: GhostPage

ID :
0
Page =
Database record: Page

ID :
0