How did I mess this up? transferring iTunes library to new HD

Question

I have done this before with no problems, but this time....
I bought a new external (portable) HD so that I could dedicate one disk to my iTunes library (over 70 gigs and growing...).
I copied the library folder from my old drive (also an external drive). I then disconnected the old drive. I launched iTunes, navigated to the appropriate page in Preferences and selected the newly moved music folder.
When I click on a song, though, the ! shows up.
How can I force iTunes to update its index (or whatever it's called) to "see" the new folder?
Thanks for helping...
Brad Pearson
THG Music
Spokane WA
MacBook Pro 2.33 gHz   Mac OS X (10.4.9)   2 gig RAM

Answer 1

Whoops.
It's the Option key on the Mac.
But when you say to "choose the library", you are referring to the iTunes Music folder with all the song files right, not the iTunes Library file?
No, I am talking abou the iTunes library file.
Also, when you say "copy the entire iTunes folder" are you referring to the folder under home>Music>iTunes or again, the folder containing the song files?
No, I am taking abou the entire iTunes folder in Home/Music, not just the iTunes music folder.
The iTunes folder should contain;
Artwork folder
iTunes music folder
iTunes library file
iTunes library.xml file
{maybe} Previous iTunes libraries folder
iTunes 6 and earlier required the home/Music/iTunes to be there.
This is where the iTunes library file stayed and where iTunes defaults to. You could move the iTunes music folder via the iTunes prefs somewhere else.
With iTunes 7, you can move it and also create additional libraries, wherever you want by holding the Option key and selecting Create new library.