[Plugin: WordPress Mobile Pack] Error when activating

When trying to install wordpress-mobile-pack.1.2.4.zip on my 3.3.1 version of WordPress:

I get:
Unpacking the package…
Installing the plugin…
Plugin installed successfully.

Then when I try to activate it I get:
Plugin could not be activated because it triggered a fatal error.

That’s the whole message, nothing more…

Can you help?

Thank you very much!

Bobby

https://www.ads-software.com/extend/plugins/wordpress-mobile-pack/