Issue trying to retrieve records from excel database

Hi,
I'm trying to perform a complex query using ado on excel worksheets. The query is something like this:

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The tblCustomerSection$,tblFisSection$ and tblScfBusinessUnit$ are worksheets. I run the query like this -> rs.Open sqlQuery, conn, adOpenStatic, adLockOptimistic, adCmdText.
But get the following error "The field is too small to accept the amount of data you attempted to add. Try inserting or pasting less data"
Any ideas?
Thanks.

Have narrowed this down to a problem with the "[tblCustomerSection$.ChangeRequestTitle]" field. The query would work if I did the following:

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But when I add in the extra "[tblCustomerSection$.ChangeRequestTitle]" field I get the error I received above. Any ideas about why this could happen with excel fields? It's just a select statement. I can't figure out whether it's an ado problem or an excel field spreadsheet problem. If noone can answer what other options can I use apart from ado for adding,updating spreadsheets?
Thanks.