Access to data denied!

strange.

I have create an archive stored in a directory c:\Archive in the network … since one month ,

Today , impossible to open the archive ,

I think the problem comes to the .ft files ( indexation ) with the explorer it is the same,

Impossible to rebuild the index , I can’t delete it, the index !! I think the problem come to the indexe file …

How can I do ?? to rebuild the index or delete it …