My bad, it's HSupdate.exe
I was posting this on my Mac, so I had no access whatsoever.
Download as a direct link from SoulMS's website. I had the same error a few weeks ago. Try using WinRAR to decompress the file, because that's what they porbably compressed it with.
Place the HSupate.exe
inside your Hshield folder and try again. If that doesn't work, then go to
http://soulms.roflforum.net/help-and-tutorials-f3/how-to-fix-hs-problem-d-works-100-t267.htm and download the downgrader.
Use the dowgrader, the instructions inside are fairly simple.Try again, and try logging into a channel with little or no people on (the channels with the low population bars).
Sorry for that misleading mistake.