Do you see the firewall icon (brick wall in front of the blue globe)? If you're firewalled you'll see few uploads.

In LW go tools > options > big reports > view example. Scroll down to 'recieved incoming this session'...if it's false then you can't recieve incoming connections from other computers & so most, if not all, people won't be able to download from you.

Have a look at this sticky, it has heaps of info about firewall issues. Start by making sure that you're only using 1 software firewall & that it's configured properly.
Connection problems? Check here first!

Read the parts about enabling UPnP & port forwarding. If you're connecting through a router it might have it's own internal firewall.

If you're stuck, tell us some details.
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