Component not found

Hello

Yesterday I install very well the quickstar template, and worked a little.
Today, I cant edit the components Gavick Photoslide GK3, Gavick Tabs manager GK3, JComments and K2. When I go to the menu in the admin zone and click in this components, the message is: Component don't found.

In the FTP server I can see this components. And yesterday worked well.
What's can be happened?

Thank you and sorry for my english.

I found it! Thanks anyway.