Database updating failure on iPod

[PHK Brasil]

♪
I have my songs with rebuilded database in Rockbox, on my iPod 5G 60gb.

But, if i go to Apple OS in iTunes, and do some changes in tags (name, genre, etc...) they are not recognized in Rockbox. I`m not inserting new songs, just changing infos on the existing ones.

I tested using Auto Update (Directory Cache ON), Update Now, and nothing happens. The changes are not transferred.

The only way to works was rebuilding all database in "Gal. Settings > File View > Database > Initialize Now".

Any help, please?

♪

[nls]

The database doesn't detect changes to existing files.
I thought iTunes only changed meta data in its own database and not in the actual tags...