I need help!some of my thumbnails dont show...

[arges]

Hey,
Anyone can tell me why some of my thumbnails dont show?
This happen when people visit my gallery,and i pass all the time using the "rebuild or resize intermediate pictures and thumbnails" in the admin tools for making all the images appear good!After a time other diferent thumbnails stop show again!
I do this 4 or 5 times in a day,or more!
Why this happen?Can be any bad configuration or permissions in the server that host my coppermine gallery?
My images have max 640.

I have one album with a wrong image inside that i try delete the album and that image but my coppermine says the folder dont exists!I can´t delete the album and the image!I try using all the methods in the admin tools for delete image or album,this image dont exist in my server!
Can be this a problem because of this specific album corrupt that makes the rest of thumbnails not display in the screen!
Thanks,

[Nibbler]

A link to your gallery would help.

[arges]

This is the gallery that have display problems with some thumbnails.
http://shishas.4sql.net/geral/index.php

[arges]

 The corrupt album says when i try to delete them "The selected album/file does not exist !"
I put this album with permissions only to show to adminstrator,but i want delete!
How can i delete?

[Nibbler]

Re-create the folder you deleted and then try again.

[arges]

Thank you soo much!
I create the folders with the same name and works!!
After,it was possible delete the album and the image!I never imagine this,it was so easy:)
I guess now my thumbails display in the screen well!I hope they never stop display again!

[arges]

Well after all the problem continues...
I delete the folder and the album,but it wasnt this that makes some of the thumbnails dont display well.
Can be the force ads that my host put in my page?
I have the permissions in the folders right like the manual says.
I ask them to give me the code to put in my template,i will have to wait and try this...
Anyone can help me,what can be the problem?

[Nibbler]

I don't see any missing thumbnails.

[arges]

Now appear well, because i finish rebuild the thumbnails again.
But it will stop show again!  :'(
What can be the porblem?
thks

[Nibbler]

We can't tell unless we can see it ourselves.

[arges]

Ok,but here i have it,and i have two diferent computers,in one of them im using ubuntu based linux and appears,the same!
Thanks anyway for ur help!I only want that all the thumbnails are display correctly!