Can you remember the last thing you downloaded before this started happening ??
I'd say there is a corruption in one of your files and it causes limewire to close...
you can check this by trying to access your shared folder outside of limewire...
By default go to My Comp > HDD > Documents and settings > User (your folder name) > Shared...
If it gives you the same message LW does it is definitely a corruption and you will need to work out which one it is and delete it...
If it doesn't post back and we will find another solution...
