Incomplete DLs won't resume

Hi all, my incomplete downloads suddenly won't resume anymore. As a matter of fact they don't even show in limewires downloads list anymore...th efiles themselves are still in the incomplete folder, and the downloads.dat file is there too. I have no idea what could have caused this, as I have made no changes. I did update limewire, but I still used it a few times after that and everything was fine. Is there any way of resuming those downloads? oh, here are all my system specs and any other useful info: -I'm running vista home premium under admin account -Using vista's firewall -2.5gb ram -30gb free hd space -broadband -i'm not a lw noob -using lw 4.18.3 -The test at http://www3.limewire.com:6346/ worked Thanks in advance for any help!