Lightroom 3.6 issue,Help!!

All of a sudden all my files are "offline or missing" Yikes!!
How do I fix this? Thanks

Find the folders and files with your OS browser to make sure they all exist without problem. If there is a problem restore them from latest backup. Don't even tell us if you don't have routine backups.

Then tell LR to import the files. With luck LR will import the files and any sidecar files without problem. Personally I like using DNG files instead of native raw formats to prevent losing sidecar files.

Make a plan to upgrade to LR 4.5 when it comes out of beta later this year. No future in holding on to LR 3.x

I was able to fix most of the problem, Thanks