I think you have 2 seperate issues going on here...
Firstly you are recieving a Java error...

So try this...
Try uninstalling all versions of Java from the add/remove programs and then re-install the JRE 5.11 offline version....
Archive: Download Java 2 Platform Standard Edition (J2SE) 5.0 Update 11

Also try deleting your preference folder/s...
Fixes for Limewire when LW isn't operating as it should

Then with your error report when trying to access your shared folder, that is, as what Birdy mentioned, probably a corrupted file, it wouldn't of been the one that was at 7% downloading as they do not enter your shared folder until completley finished...
So try going back to what you downloaded before this happened...

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