flashget reviewWhy can't I install my flashgot plugin on the new version of firefox?

I'm trying to get my flashget to work, and I'm trying to install flashgot. When I try to install it I get this error.

Firefox could not install the file at

https://addons.mozillaflashget review.org/en-US/firefox/downloads/file/37060/flashgot-1.1.1.1-fx+mz+tb+sm.xpi

because: Unexpected installation error
Review the Error Console log for more details.
-203

Any help would be appreciflashget reviewated.
I think its the compatibility problem.

Which version are you using?

If its not firefox 2.0, then try it because this version supports maximum extensions.