Also keep in mind the p2p client programs that might be a part of your sources. Some, such as Shareaza (RAZA) use most of their upld bandwidth on a different network, thus getting 0.01 to 3 KB/s from them is not unusual. (If you wish to see the clients you're downldg from, right-click on the top of the columns & select Vendor. This will show an xtra column.)

Also sharing from multiple hosts, well some might just be offering a small amount each.

Remember, if you have search or browse results still up you can reselect the file to downld after stopping it. This sometimes re-invigours the downld. More hints & skills about downlding here (see all the off-shoot links): To continue files downlding (click on link)

As for isp's blocking or filtering speeds, well some are known to target specific programs. As you can see here: ISP's known to BLOCK or Filter p2p or specifically Limewire