VBA SQL Query

I'm using the following code to get a date value (or date values) from a text box, convert it to a string variable, and use it in a make table query.  The code works fine for Case "Equals" but builds an empty table for all other values.  If I take the variable and run it in a query by grid, it works fine for all Cases.  Also I am unable to monitor the value of strSQL in a watch window.  It shows a value of <Expression not defined in context> .

Select Case FlagDates   'Sets parameter format
    Case "Equals"
        flg1STda = Me.txtStartDate.Value
        MakeTbl
    Case "Before"
        flg1STda = "<#" & Me.txtStartDate.Value & "#"    'Less than <#mm/dd/yyyy#
        MakeTbl
    Case "After"
        flg1STda = ">#" & Me.txtStartDate.Value & "#"    'Greater than >#mm/dd/yyyy#
        MakeTbl
    Case "Between"
        flg1STda = "Between #" & Me.txtStartDate.Value & "#" And "#" & Me.txtEndDate.Value & "#"  'Between #mm/dd/yyyy# and #mm/dd/yyyy#
       

Public Sub MakeTbl()
Dim strSQL As String
strSQL = "SELECT tblTest.* INTO TSTable FROM tblTest WHERE tblTest.[flag1date] = '" & flg1STda & "';"
DoCmd.SetWarnings False
DoCmd.RunSQL strSQL
DoCmd.SetWarnings True

What am I doing wrong?