Folder not included in Windows 7 back-up

I have Windows 7 64 bit where C-drive is SSD and F-drive is the original hard drive. All the Libraries are on the F-drive but I do hold the Adobe Lightroom folder in c/users/owner along with WLM contacts,favorites and a few other things.

The Windows back-up i use is "files in libraries and personal folders for all users and system image"

I have just recently moved the Lightroom catalog from My Pictures (on the hard drive) to the c-drive as above in order to speed things up. But, on my first back-up after doing this, I noticed that the Lightroom folder was not included in the back-up even though all the other folders on c/users/owner were included,

Is there any reason why the Windows back-up might decide to ignore that particular folder

hello Kado,
Thanks for the reply but I don't know what you mean. What set up procedure are you referring to - the one where I tell the back-up program what kind of back-up I want (I use the recommended one, as i have always done) or are you suggesting that I should delete my Lightroom folder then re-add it?

As I mentioned in the earlier post, all the other folders in c/users/owner were happily saved to the back-up. These included Appdata, Contacts and Favorites among others. There were no problems with the F-drive

If it's of any help, I look at the back-up folders using:
control panel/backup & restore/restore my files/Browse for files (or folders)

Hello Kado,
Thanks for your suggestion. I did this and made sure that the Lightroom folder was ticked as well as Appdata, contacts etc

It is now working fine but i have no idea why it was not working earlier.

Thanks for your help
John