MySQL, sqlyog access denied for 'username'@'ip-address'

[s3741327]

While connecting to MySql server mo, it is constantly showing me an error that access is denied for my 'username'@'ip-address'.

my username is s3741327, and my password was typed along the instruction below from Business data management and analytics.

------- (instruction) 

MySQL host address:mo.its.rmit.edu.au

User name:s123456 (use your standard RMIT login)

Password:xxx99 Note: xxx is first three characters of your surname, and99 is your year of birth (all lowercase)