Some of the hard to get movies are from other clients such as Shareaza. They can be very difficult to connect to or reconnect to. You might be waiting weeks or months before you can reconnect to the particular host. All i can really suggest is try for those videos from LW users that are sharing. (BTW you can see who [the particular client] has the file by right-clicking the very top of the column & choose show Vendor/version from the menu that shows.) Other than that, see the following link & follow all the off-shoot links to find hints & extra skills to help solve your problem:
To continue files downlding (click on link)