🚀 go-pugleaf

I Apologize if this is a stupid question, but I haven't had
any success thus far on resolving this issue.

I have a TADO query setup at design time with a SQL Statement
and Parameters. 

When I assign the Parameters based on the design time query
everything works peachy clean.

// Perform SQL Operations
QueryPointer->Close();

QueryPointer->Parameters->ParamByName("StartDateTimeString")->Value = StartingDateTime;

QueryPointer->Parameters->ParamByName("EndDateTimeString")->Value = EndingDateTime;

QueryPointer->Parameters->ParamByName("TagNameQuery")->Value = TagNameString;

QueryPointer->Open();

Do stuff with the dataset.

The SQL Statement is 
SELECT tagName, timeString, curVal, offset
FROM DBA.vwAccumMinute
WHERE (tme >= :StartDateTimeString) AND (tme <= :EndDateTimeString) AND (tagName = :TagNameQuery)
ORDER BY tme

On the Down Side:
When I manually create the SQL Text:
The error I get is a type mismatch.

QueryPointer->Close();
QueryPointer->SQL->Clear();
QueryPointer->SQL->Text = SQLStatementString;
QueryPointer->Open();

...
SQLStatementString = 
"SELECT tagName, timeString, curVal, offset 
FROM DBA.vwAccumMinute 
WHERE (tme >= '1138778100' AND tme <= '1138863600') AND (tagName = 'Tag1') ORDER BY tme 

On the analysis of both SQL Statement's, they appear identical. 
The process I use is just a little different.

The reason I am doing this is to see if I can use the same Query with a "modified" sql statement. 
i.e. SELECT tagName, timeString, curVal
blah blah blah...
WHERE (tagName = 'This' or tagName = 'That' or tagName = 'Meep')

Any assistance is HIGHLY appreciated.
PS: Code is in the correct order and compiles fine. 
I'm just trying to get across my problem, so please don't take
the represented code line by line.

Thank you v. much,
Heinz