After timezone table update, Convert_tz still returns NULL with named timezones. what to do??

[Stephane Halle]

Hi all,

I recently installed MySQL Server 5.5 on my Windows 7 machine. All mysql.timezone* tables are present but empty,
so I :
- went here : http://dev.mysql.com/downloads/timezones.html
- downloaded the POSIX package
- stopped the MYSQL running service
- updated the files in the data/mysql subfolder in the MySQL installation folder
- restarted the MYSQL service

and using the convert_tz function still returns NULL when using named timezones.

So I looked into the tables, are they are still all empty. ??? Seems the update does not work?
I also tried finding just the .sql scripts so I can manually add the the data to the tables one table at a time, and I couldn't find any.

Any ideas? Anything would help, thanks in advance,

Steph