Powershell and robocopy find file name and extension

Hello,

I am busy with making a script that will search for the latest file with a specific extension.

After powershell found the file it needs to copy that file by using robocopy !

I have made this code:

$dir = "C:\robocopy"
$latest = Get-ChildItem -Path $dir | Sort-Object LastAccessTime -Descending | Select-Object -First 1 | Where {$_.name -Match "test*" -and $_.extension -eq ".txt" }
$latest.name
$source = "$dir\$latest"
Write-Host "$source"

$Destination= "D:\"


robocopy $source $Destination

But this is the result i get :

$latest = Get-ChildItem -Path $dir | Sort-Object LastAccessTime -Descending | Select-Object -First 1 | Where {$_.name -Match "test*" -and $_.extension -eq ".txt" }
$latest.name
$source = "$dir\$latest"
Write-Host "$source"

$Destination= "D:\"


robocopy $source $Destination
C:\robocopy\

-------------------------------------------------------------------------------
   ROBOCOPY     ::     Robust File Copy for Windows                              
-------------------------------------------------------------------------------

  Started : Fri Nov 22 11:35:07 2013

   Source : C:\robocopy\
     Dest : D:\

    Files : *.*
	    
  Options : *.* /COPY:DAT /R:1000000 /W:30 

------------------------------------------------------------------------------

	                  5	C:\robocopy\
	
	    New File  		       0	test.cmd
100%  
	    New File  		       0	test1.txt
100%  
	    New File  		       0	test.txt
100%  
	    New File  		      18	test2.txt
  0%  
100%  
	    New File  		       0	test3.txt
100%  
	 

------------------------------------------------------------------------------

               Total    Copied   Skipped  Mismatch    FAILED    Extras
    Dirs :         1         0         1         0         0        45
   Files :        5        5         1         0         0         9
   Bytes :   1.989 g        18   1.989 g         0         0  485.51 m
   Times :   0:00:00   0:00:00                       0:00:00   0:00:00


   Speed :                 666 Bytes/sec.
   Speed :               0.038 MegaBytes/min.

   Ended : Fri Nov 22 11:35:07 2013

So the problem is already that it doesn't take the right file.

now it will just coppy all files from it .

Please help me.

Regards,

Dirk