服务器是mysql -加你的首字母
应该是s

＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

建议你仔细阅读sf自己带的说明。

MySQL Service
Service details:

Access this project's databases over the Internet
Documentation: Guide to MySQL Database Services
Hostname: mysql-n   (exactly as shown, with no domain suffix)
（我的用户名是nyyzsyb）（只有首字母）
Database name prefix: n718808_ -- i.e. "CREATE DATABASE n718808_myapp" as your ADMIN user.
RO user: n718808ro (SELECT)
RW user: n718808rw (SELECT, INSERT, DELETE, UPDATE)
ADMIN user: n718808admin (has RW account privileges, and CREATE, DROP, ALTER, INDEX, LOCK TABLES)
（只有用户名的第一个字母，就是n）

web-access URL: https://mysql-n.sourceforge.net/
Please note that your MySQL passwords are displayed here as plaintext for your convenience. These passwords are readily available on the project shell and web servers. Their display here allows for easy lookup by project administrators.

也就是说，不同的用户是不一样的。

可以看我写的教程。
http://www.idc866.com/thread-15204-1-1.html