the code looks correct.
to troubleshot, i'll need you to make a few changes to the page that will output information to help see what is going on:
1) add the following code at line 1 to turn on error reporting:
2) Disable the insert redirect. change the following code:
$WA_redirectURL = "boardminutes_Results.php";
$WA_redirectURL = "";
3) on the bindings panel, expand the WA Uploaded Files Global Status group and drag the debug info binding to the page just before the </body> tag
4) add this code just before the </body> tag for more info:
post back the results after trying the upload again.