Libre office portable apps

Hi,
I've downloaded portable version of libre office, and put it in start menu.
In effect, I can see it in the final result, but if I try to launch calc, write... nothing happens and I can't get any error message.
What happens? 
Other simple apps (totalcommander, irfanview) worked well.
Thx

OpenOffice was good enough, now, thanks to Libre Office, I use Kingsoft Office free, it is the best.

not a problem change office suite but ... this Kingsoft Office is working under win7 live cd?
Thanks

It works fine,  this is my old plugin:

http://www.adrive.com/public/zvCSac/kingsoftplugin.7z.txt

Thanks Oscar for the Kingsoft Office plugin

However, I tried LibreOfficePortable, heavier, it has worked without worry here. I have used PortableApps.com plugin to add it.
It needs Ram (tested here in VMware with 1.5 Gb of Ram). Program files folder is not allowed (anyway, it is too heavy to be in boot.wim), you need also to have it on USB, the prtable version require a writable media (some LibreOffice files are changed).
Kingsoft Office sounds very good and more suitable for PE.

Wooooww 
It works great!
Thank you 

What I most like of Kingsoft is that it can open MS Office password saved files.