Windows WAMP problem: "The album 'xyz' is not writable."

Hello,

I have a problem with a gallery running on my home computer and WAMP.

two album show the warning: "The album 'xyz' is not writable."

This is absolutely no problem of rights - none of the directories/ files is write-protected and I dont have a similar problem with any of the other albums that I uploaded.

Is there any lock-file or status that has been set? (I couldnt find any)

The problem occured after doing some maintenance jobs (updating images)