Sorry, Component JACLPlus has been installed UNSUCCESSFULLY?

I am using joomla 1.0.13 and i am trying to access JACLplus but this error is occuring and i dont know why? it was r开发者_开发知识库unning fine and all of a sudden now it is saying this?

Sorry, Component JACLPlus has been installed UNSUCCESSFULLY

i have never used joomla and have inherited it.

Before anything else, your version of Joomla is way out of date. The current version is 1.5.22. You should look at upgrading.

As for the error, can you see JACL in the backend of the website? Looks like it's been uninstalled but not all of the files have been removed.