This may be a silly question but did you install the ACE drivers on the SQL Server instance machine or your local machine?

EDIT - never mind... saw your...

That trigger looks right to me.  
When you say that it fires for the first insert but not others, how many rows are being inserted at once?  What does...

For the licensing, a good read is:
http://download.microsoft.com/download/C/3/7/C37F243B-0246-493E-ABFC-41A7FFD6DE38/SQL_Server_2012_Virtualization_Licensing_Guide.pdf

I misunderstood the licensing model.  What I was stating was licensing for maximum virtualization.  The advantage of using this is...

If you were willing to spend some money, I'd do it with 4 separate VM's and then load up a tool like DxEnterprise (similar to Polyserve back in the day)....

Just because the "Events" table has information you don't care about, there was also  8 consistency errors in database 'ACSA'.

Running that could drop things you DO care about.  It...

Pretty sure that means your DB is corrupt.  I'd run
DBCC CHECKDB
and see if it is bad.  If so, I'd run it on your live one...

If you are not using Enterprise Edition, you should check the ReportServer.dbo.Keys table.  Actually, even if you are using enterprise edition, might not hurt to check that.  Standard will fail...

Here ya go:
USE [ReportServer];
GO;

--View all of the SSRS jobs
USE [ReportServer]
SELECT
        [Schedule].[ScheduleID] AS [SQLAgent_Job_Name] ,
        .[Description] AS [Description] ,
        [Catalog].[Name] AS [Report Name]...

If you want to know when the subscription is scheduled to be run, look at the SQL Agent Jobs.  Those are what are triggered to start a subscription.  The names...