uploading csv files

Hi everyone,

I got trouble uploading a csv file in php. Cant seem to figure out whats wrong, it always lead me to "nicetry" even though im sure im uploading a csv file.

upload_page

<?php
		
echo "<form action='upload_process.php' id='upload_form' method='post' enctype='multipart/form-data'>";
   echo "<table id='class1' align='center'>";
      echo "<tr>";
      echo "<th colspan=2>Upload</th>";
      echo "</tr>";
      echo "<tr>";
      echo "<td colspan=2><input type='file' name='file' id='file' size='50'/></td>";
      echo "</tr>";
      echo "<tr class='alt'>";
      echo "<td colspan=2><input type='submit' name='upload' value='upload' /></td>";
      echo "</tr>";
   echo "</table>";
echo "</form>";

?>

upload_process

$mimes = array('application/vnd.ms-excel','text/plain','text/csv','text/tsv');

if(in_array($_FILES['file']['type'],$mimes)){
   echo "csv file!";
} else {
   echo "nicetry";
}

any input would be very much appreciated.

thanks!