Hello,
I'm using LW 4.10.5Pro and Java 1.5.0_10. I have the following problems:
1) since my DL speed is too slow, I leave the DL overnight but I noticed that all the DL's were missing the next day. I go to Library/Incomplete files (all were in red)and resume DL again of all the files(mostly movies) but they all started at 0% eventhough some were already at 70% before.
2) I cannot preview my DL's when some are already at 30-80%. Try doubleclickin and the preview button but both not working.

Can anybody help me to solve the above problems? Also how do I my DL speed faster?

1. may be due to not enough sources or ISP p2p shaping. If the downloads are missing, check your settings. Make sure incomplete files are set to be kept for more than the default 7 days. I set it at 999 days.
To find your downloads, go to your LW Library window, select Saved Files folder & press the Explore button. Sample image here: Using Library Explore button to access downld folder (click on link) & the folder will open up for you. You will probably find them there.

2. What program are you using for previewing? I'd suggest you go to Library window, select incomplete folder, find the incomplete file & select it. Then press Launch. This has the advantage of not producing a preview file.

For more help, we need answers to both the questions I asked above & also these ones: System details - help us to help you (click on link)