[Plugin: Shadowbox JS] pb for install plugin

hi,
im french, sorry for my bad english…

I tried to install via filezilla but can’t see into my plugin link, so I delate it via filezilla and then install it via the option ‘install your zip (on the plugin page). now still can’t see it into my plugin page and Ive got a new error message into my dashbord and into my website that I don’t know how to fix :
my website :
https://www.lapinsdamour.tk
I used the “darkzen’ theme

the message on the top of the page :
Warning: main(/mnt/142/sdb/8/8/lapinsdamour/lapin/wp-content/plugins/shadowbox-build-3.0b/) [function.main]: failed to open stream: Success in /mnt/142/sdb/8/8/lapinsdamour/lapin/wp-settings.php on line 473

Warning: main() [function.include]: Failed opening ‘/mnt/142/sdb/8/8/lapinsdamour/lapin/wp-content/plugins/shadowbox-build-3.0b/’ for inclusion (include_path=’/mnt/142/sdb/8/8/lapinsdamour/include:.:/usr/php4/lib/php’) in /mnt/142/sdb/8/8/lapinsdamour/lapin/wp-settings.php on line 473

Does anyone can help me please…
I really need to find a plugin who works, and well works ??

thank you VM.

Mu.