Web browser error 500 trying to get most recent torrents

For 80% of new torrents I want to download on clicking torrent's link on the torrent's Web page, I get "Error 500" from my Web browser (IE7) every single time.
I haven't changed my Web Browser settings, no new add-ins, no proxies, nothing out of ordinary as compared many months ago when everything worked perfoectly, they .torrent files just don't come from the Web browser as HTTP response, so my use of Bittorrent client is completely irrelevant. It does the job for 100% other torrent servers I use.

There is something broken in the Web site code/database, and it would be nice to have it fixed, since it persists for over a month, if not longer. As a user who donates, my current ratio 0.72 (after converting my immortal points) - well above getting my download permissions revoked - I find it very annoying and starting to look at TribalMixes competitors, if they can help me get what I want without the bugs, I'll have no hesitation to switch and give any donations to them.

Please, I don't want to spend an hour finding out that I'm lucky to get 1 or 2 torrent out of 10 I would like to have (already spent 4-5 hours total in the past weeks). If I can't download them, I can't reseed them, so my ratio does not improve. I consider no new donations until the technical problem is resolved within weeks, I'm not gonna stick around much longer if it stays the same another month. I really don't care if the Website is AJAX-enabled, skinnable or not, just need the content.

Another thing, I get "Error - download refused - only 1 undead torrent allowed to download at the same time with Active Warning" when I try to download some of the months old stuff. I don't get it error's meaning, and frankly why should I care. If you have a torrent that cannot be downloaded, don't show it in the list of torrents - and please don't waste my 15 minutes before it gets entered in my torrent client until the tracker displays it.
I appreciate your hard work put into creating this community devoted to electronic music. Just please stop make up artificial and confusing rules for your users (too low ratio is the only one I can put up with) and go back to Website version where users don't have to troubleshoot your error messages. Right now your server is in "beta testing" mode. Thank you in advance and good luck.