When LimeWire is uploading at the limit of my connection, then I get no downloads. This could be an ISP issue, but my AsynchronousDSL line manages to be two way up until the limit.

Usually setting the upload speed to a little below my theoretical maximum fixes this unless one or two high speed connections take up all the bandwidth themselves.

It looks like limewire's message handling is getting caught in a wait state when there isn't enough bandwidth to send data as fast as it is being asked for (or summat).

This could be specific to my ISP - but it might explain some of the problems others have reported with not being able to stay connected to peers or ultrapeers (with very little download speed left, the peers get dropped as well as losing speed on file downloads).

Mark

A more careful watch of what's going on suggests that the other possibility is that someone else is using my bandwidth. I'd managed to forget that I was on a contention ratio line. Someone else is much more likely to be downloading than uploading - so uploads are usually still going at full steam when my download is reduced to a crawl.

Mark

Try to disconnect from the network, or make sure you are only connected to ultrapeers.
Also, there is an option in LimeWire where you can set the limit.

If you are an Ultrapeer you will have to allocate at least 10k/s of your Upstream and Downstream for your connections. So if that's too much for you, you should disable Ultrapeer capabilities in the options->speed while trying to download something. If you don't need LimeWire to download anything, you should enable it again to help the network (at least if you aren't sharing lots of files)