diff --git a/app/controllers/submissions_controller.rb b/app/controllers/submissions_controller.rb
--- a/app/controllers/submissions_controller.rb
+++ b/app/controllers/submissions_controller.rb
@@ -95,7 +95,7 @@
   def submission_authorization
     #admin always has privileged
     return true if @current_user.admin?
-    return true if @current_user.has_role?('TA') && (['show','download'].include? action_name)
+    return true if @current_user.has_role?('ta') && (['show','download'].include? action_name)
 
     sub = Submission.find(params[:id])
     if @current_user.available_problems.include? sub.problem