i had this same problem
the version of newsleecher i had was a cracked copy
and it would only download for a short period of time
i have now switched over to newsbin (cracked version) and i aint had any problems since
it aint as good at giving consitent speeds like newsleecher did........ but at least it works
if your newsleecher is a cracked version then ...... u have probably got the same problem as me!