Choose multiple files by autoit

Hello,

I have the next code:
1 ;MsgBox(0,"Parameters",$CmdLine[1]) ;Sending parameters through command line
2 FileCopy("C:\W3C.png", "C:\"&$CmdLine[1]&".png") ;Make a duplicate copy of the file, as same file name is not accepted
3 sleep(3000);delay for 3 seconds for the file to create
4 WinWaitActive("#32770", "Choose File to Upload",10)
5 WinFlash("Choose File to Upload","", 4, 500) ; Just to Flash the window
6 ControlSetText("Choose File to Upload", "", "[CLASS:Edit; INSTANCE:1]", "C:\"&$CmdLine[1]&".png") 7
ControlClick("Choose File to Upload", "","[CLASS:Button; INSTANCE:2]");

Runtime.getRuntime().exec("C:\\NEW.EXE " + FileName); //call Autoit script with one parameter FileName

which works perfect when I choose in File name just one file. It make problems when I insert multiple files. meaning, fileName = "file1" "file2" "file3".
I write just file 1, and doesn't continue.

Hoe can I solve this issue?