Hydra 0 Valid Passwords Found

ave been trying some basic tutorial about hydra brute force. Please understand i do not plan to use this unlawfully. Am trying a tutorial from here https://automatetheplanet.com/thc-hydra-password-cracking-by-examples/ how ever even after i copy and paste the code i get 0 valid passwords found. The password is 12345 and its in a pass.txt file but it doesnt work. This is the code i used.

hydra -l admin28 -P pass.txt -o found.txt -vV testasp.vulnweb.com http-post-form "/Login.asp?RetURL=%2FDefault%2Easp%3F:tfUName=^USER^&tfUPass=^PASS^:S=logout admin28"

Screen shot

Seriously guys is their something am doing wrong or is this a bug with hydra? Am running this with CMD not Cygwin. Thanks.