Powershell parameter will not provide OleDbdataAdapter.fill valid SQL statement - powershell

Question

I has been trying to figure out why I am not able to use a parameter in the powershell script to fill in a datatable via OleDBDataAdapter. Here a snippet of the code and the error I am getting.
Function DBF_FileImport
{
Param(
[Parameter(Mandatory=$True,Position=1)]
[string]$tblTemp,
[Parameter(Mandatory=$True,Position=2)]
[string]$strSQL = $(throw "Please specify a query.")
)
### ConnectionString to pull data from DBF file ###
$ConnString = "Provider=Microsoft.Jet.OLEDB.4.0;Data
Source=$filepath;Extended Properties=dBASE IV;User ID=;Password=;"
$Conn = new-object System.Data.OleDb.OleDbConnection($connString)
$Conn.open()
#Create the new recordset
$cmd = new-object System.Data.OleDb.OleDbCommand
$cmd.Connection = $Conn
$cmd.CommandText = "$strSQL"
#create the datatable
$da = new-object System.Data.OleDb.OleDbDataAdapter($cmd)
$dt = new-object System.Data.dataTable
$da.fill($dt)
$Conn.close()
The error I receive every time I run the function is:
Exception calling "Fill" with "1" argument(s): "Invalid SQL statement;
expected 'DELETE', 'INSERT', 'PROCEDURE', 'SELECT', or 'UPDATE'."
At userpath.ps char:1
+ $da.fill($dt)
+ ~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : OleDbException
If I put the SQL statement inside the function then it works fine. I dont know why it is behaving like this. I searched the internet and was not able to find anything that will help me to solve the error. Any info you can provide will help greatly. Thank you