Well, first of all, seeing as how you received a reply to your post on the developers site saying "there is a bug and it will be fixed in the next release," that should give you your answer as to why it doesn't work.
Second, if this were something that anyone here could help you with, we certainly can't help if you don't provide accurate/enough information.
I think you need to
1) learn to use
Google,
and
2) learn
how to ask a question (even
Microsoft has a humor here)
Other : LZMA Decompression Help
