Apologies, but this forum only supports the FrostWire version 4. For the torrent only version, please visit FrostWire Community Forums • Index page
Although your comment, only the torrents vanish suggests maybe it's not FW 6 or later. We are not knowledgeable about FrostWire's torrent behavours.
It might be a question of how you are opening torrent files. Directly via the site using magnet links or via .tor files? If you are opening via magnet link, then the magnet link might be failing. I noticed this as a problem with one torrent site in particular with about a 15 to 25% success rate. And your problem has all the hallmarks of a failed magnet link download!
If possible, try to first download the torrent file (.tor) and open that file with FW. (If that torrent site does not offer .tor downloads, see if you can find a mirror site also hosting the same torrent. Some torrent sites will have a page or section showing mirror sites for a particular torrent.)

I just tried opening a torrent file (.tor) downloaded from a torrent site and no problem starting the torrent download, although it took a few minutes. Another appears to have no seeds (these torrent (.tor) files were over 2 years old.)

If you are using FrostWire 4, then hopefully you do not see a brick wall icon near the connection icon bottom left of the FW screen.

yeah ty dude i didn't know it was for 4.0 ..so o downloaded it and my connection failed.. I have a t3 or higher and my firewall as enabled it to go thru just not connecting to the fw site as for 6.7 fw my torrent files i use are not from the torrent sights like kat ..ect i just click on the name in the search windows as they come up and when they go to the transfer window they disappear and i can't see how long the transfer will take or anything...Yesterday I removed all the torrent files from my user in windows and from the torrent files under program files and moved the filed i had downloaded to another hard drive turned on fw and went to library and deleted all that was there and restarted fw and the files kept on downloading. putting a fresh downloaded files back on the other hd.. so again i exit fw and did all the same thing and again it started dowloading the files again only did i say screw this and uninstalled fw did the torrents stopped downloading after a reinstall... so if ya can help me why my connection with 4.0 seems to fail let me know ty again for your time