ITunes Freezes when I try to open it

Question

I've been having issues with my MacBook since upgrading to Leopard. I eventually had to perform an "erase and install," but first backed up my files on CDs. In particular, using a feature on iTunes, I backed up my 4000+ iTunes library on approximately 30 CDs. A while back I previously used these CDs to "restore" my library when I had to erase my hard drive a few months ago (prior to my installation of Leopard).
I was only on the second CD during my restoration when the progress indicator just stopped transferring the songs to my library. Unfortunately I cannot remember the exact circumstances under which I stopped the process, but I did abort it after the second CD. Now, whenever I attempt to open iTunes, the window pops up showing my library, then my cursor turns into the multi-colored pinwheel (I can access the dock and desktop, its just a pinwheel with iTunes). In the window that normally displays song information, it says that it is attempting to connect to the iTunes Store, but it never connects. This goes on as long as I let it. Sometime I am able to force quit, and other times I am forced to reboot using the power button.
At first I obviously tried rebooting, then I read these forums and tried a few things to check the disk, including pressing Apple+S during boot up to bring the command screen and ran "fsck -fy." It check my disk and said it was fine. Then, using disk utility, I verified the disk (no problems). Next I verified disk permissions, and everything was normal except this:
Warning: SUID file "System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/MacOS/ARDAg ent" has been modified and will not be repaired.
When I repaired permissions it gave me the same message.
Are these problems related? Do I need to do an erase and install again... is that even normal to have to do about 3 times in 6 months?
One last thing, I recently used software upgrade to download and install 10.5.1. As had happened to me before I even upgraded to Leopard, the process was not successful, and I had to manually download and install the upgrade (which worked). Like I said, this was not the first time this has happened on this machine, although the last time it happened was with the last release of 10.4, and I have since upgraded to Leopard, and erased my HD at least once. Sometimes I wish I had never upgraded from by PowerBook G4...

Answer 1

try these user tips:
try removing the Genius database. In the "Finder" go to the /username/Music/iTunes/ folder and delete the "iTunes Library Genius.itdb" file. This may allow the program to launch again. This file will be recreated upon first use of the "Genius" feature.
and, if you have flip4mac installed
I found that the TSLicense plugin was causing the problem.
From the log:
PlugIn Path: /Library/Frameworks/TSLicense.framework/Versions/A/TSLicense
PlugIn Identifier: net.telestream.license
This pIugin is installed with the Flip4Mac Windows Media Components. I solved the problem by uninstalling the WM Components via the uninstaller at /Applications/Flip4Mac/Flip4Mac WMV Uninstaller.pkg, after which iTunes opens successfully.
JGG