Why do I get this pernissions error?

I am trying to upload an image with php.

PART 1
move_uploaded_file(logos/signature.jpg) [function.move-uploaded-file]: failed to open stream: Permission denied in

PART 2
move_uploaded_file() [function.move-uploaded-file]: Unable to move 'C:\WINDOWS\Temp\php5A3.tmp'

<?php
 
if ((($_FILES["file"]["type"] == "image/gif")
|| ($_FILES["file"]["type"] == "image/jpeg")
|| ($_FILES["file"]["type"] == "image/pjpeg"))
&& ($_FILES["file"]["size"] < 20000))
  {
  if ($_FILES["file"]["error"] > 0)
    {
    echo "Return Code: " . $_FILES["file"]["error"] . "<br />";
    }
    else
      {
      move_uploaded_file($_FILES["file"]["tmp_name"],
      "logos/" . $_FILES["file"]["name"]);
      echo "Stored in: " . "logos/" . $_FILES["file"]["name"];
      }
  }
else
  {
  echo "Invalid file";
  }
 
 
?>

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