Duane Hookum's Concatentate - trouble in Access 2007?

I have a database that I created in Access 2003; there are a few places where
I use the code from Duane Hookum's concatentae funcion in my database.

The code has worked perfectly for well over a year in several instances,
however suddenly it won't work anywhere. I get a run-time error - Syntax
error (missing operator) in query expression - 'MailingID =' ... when I
debug it, the following line of code is hightlighted:

Set rs= db.OpenRecordset (PastStrSQL)

I haven't changed any of my code, however we did move to Access 2007 recently.
If the SQL doesn't appear to be the problem, I would appreciate any
suggestions on where to troubleshoot. I really miss using this funtion.

Thank you,
Heather

Here is a sample of the SQL of one of the queries that no longer works ...

SELECT sysqryShiningStarHouseholdIDs.MailingID, Concatenate("SELECT LastName
FROM sysqryShiningStars WHERE MailingID =" & [MailingID] & " ORDER BY
LastName") AS LastNames, Concatenate("SELECT FirstName FROM
sysqryShiningStars WHERE MailingID =" & [MailingID] & " ORDER BY FirstName")
AS FirstNames, Concatenate("SELECT Age FROM sysqryShiningStars WHERE
MailingID =" & [MailingID] & " ORDER BY FirstName") AS Age
FROM sysqryShiningStarHouseholdIDs;


SQL for sqryShiningStarHouseholdIDs:
SELECT sysqryShiningStarDesignators.MailingID, First
(sysqryShiningStarDesignators.ProfileCode) AS FirstOfProfileCode
FROM sysqryShiningStarDesignators
GROUP BY sysqryShiningStarDesignators.MailingID;

SQL for sysqryShiningStarDesignators:
SELECT tblMailingList.MailingID, tblDesignators.ProfileCode
FROM tblMailingList RIGHT JOIN tblDesignators ON tblMailingList.MailingID =
tblDesignators.MailingID
WHERE (((tblDesignators.ProfileCode)="ShiningStar"));

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