Error when opening Sallos

[Trios]

I have a Windows XP Pro machine all updated with Directx 9.0c and .Net 2.0.

I get the following error when trying to open Sallos:

 
System.EntryPointNotFoundException: Unable to find an entry point named uncompress in DLL zlib32.
   at Sallos.Compressor32.uncompress(Byte[] dest, Int32& destLen, Byte[] source, Int32 sourceLen)
   at Sallos.Compressor32.Decompress(Byte[] dest, Int32& destLength, Byte[] source, Int32 sourceLength)
   at Sallos.ZLib.Unpack(Byte[] dest, Int32& destLength, Byte[] source, Int32 sourceLength)
   at Sallos.ArchivedFile.Download(Stream output)
   at Sallos.ArchivedFile.Download()
   at Sallos.Archive.Load(Stream stream)
   at Sallos.Archive..ctor(String title)
   at Sallos.Archive.AquireArchive(String archiveName)
   at Sallos.Core.Verify()
   at Sallos.Core.Startup(String[] args)
   at Sallos.Core.Main(String[] args)

I have tried repairing all the installers and .Net but I haven't been able to get past this point.

Any ideas?