Need to truncate tables in adventure works 2008 /r2 using single script

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SQL-Server-2008R2

Hi Everyone,
I have a need to truncate all tables in advwrks2008 /r2 in a single go using scripts or commands.
I have tried :
"
-- disable all constraints
EXEC sp_msforeachtable "ALTER TABLE ? NOCHECK CONSTRAINT all"

-- delete data in all tables
EXEC sp_MSForEachTable "DELETE FROM ?"

-- enable all constraints
EXEC sp_msforeachtable "ALTER TABLE ? WITH CHECK CHECK CONSTRAINT all"

--some of the tables have identity columns we may want to reseed them
EXEC sp_MSforeachtable "DBCC CHECKIDENT ( '?', RESEED, 0)""

it executes only uptil halfway and shows many errors :
"Msg 1934, Level 16, State 1, Line 1
DELETE failed because the following SET options have incorrect settings:
DELETE failed because the following SET options have incorrect settings: 'QUOTED_IDENTIFIER'. Verify that SET options are correct for use with indexed views and/or indexes on computed columns and/or filtered indexes and/or query notifications and/or XML data type methods and/or spatial index operations.
Vendors cannot be deleted. They can only be marked as not active.
Msg 3609, Level 16, State 1, Line 1
The transaction ended in the trigger. The batch has been aborted."

Please help me out. Seeking help asap.

Regards
Abhishek