Try killing the dld and then resuming it from the library's Incomplete folder.
Also, this is surely not a problem of how many files you share: the leech block options that are in the Options/Preferences are inactive and do not affect a thing no matter how much you play around with them. However, don't think that uploading doesn't affect anything as if you upload you also get better speeds and search results.

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iMac G4 OSX 10.3.9
RAM 256MB
LW 4.10.5 Basic
ADSL anything from 3 to 8Mbps/around 1024kbps

"Raise your can of Beer on high
And seal your fate forever
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The Golden Age Of Leather"
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