Sabnzb still keeps dropping out

I am still having problems with Sabnzb, in that it is still dropping out, and the only way to restore is resetting the network. I have no problems on torrents, only Sabnzb. Have asked the question on several sites, including Sabnzb forums, but nobody replies, or seems to know the answer. Even tested it on other computers. Same thing happens. Really getting fed up now, because I have been having this problem for some months. Need help please.