there is no reason i can think of that would explain a winmxgroup patched copy of winmx behaving in this way, if you are using a hosts file based connection method, then it's possible you're trying to download fakes. & i suggest a visit to
www.winmxgroup.com & download Install-3.0-MultiVer.exe which will eliminate fakes from your searches.
Other than that, I'm about stumped, but popular video files often involve a long wait as queues get long while ppl download these large files, if you're seeking video i'd set AEQ at 100