Thats just how it is ... that you are getting results does not automatically mean that the answering hosts do still have free slots to send you the file.

What people apparently don't understand is that there are also OTHER people out there that download stuff from servers. So if a server has a file you want and has ten download slots available, he WILL tell you, that he has the file but will not let you download the file, if all ten slots are already in use. You'll just have to wait until a slot comes free.

Xolox helps a bit by displaying a "score" value, which effectively is just a number displaying the number of hosts who have the file you want. So, if you get multiple hits you should most of the time select the version of the file with the biggest score, as that means that the most servers do have the file which will increase the likeliness that at least one or two of them will have open slots.

Sorry - thats just how gnutella works.