756kbps is about 94.5 KB/s. You can only download as fast as your uploaders have bandwidth available, remembering they are probably uploading to others also. You are missing about 1/3 of your maximum speed it appears. Re-search topic often finds more hosts. And using the Get More Results also helps.

Example if you are downloading from dial up users, you will barely get a few KB/s. Or if someone is uploading most of their upload bandwidth to others or whilst using torrents, then that may leave little left over.

The original poster above was mostly concerned about their uploads. My upload capacity is around 90-100 KB/s, but I find I'm frequently getting around that figure, however that's using LW 4, not LW 5. So I'm not totally sure about whether my uploads for LW 5 have been getting slowed back a little. (My LW 5 is on a different boot system.)