CS4 files won't save in CS5

Question

I did some illustrations in CS4 (v11.0.2) on a PC and now the client is having a problem working with them in CS5 on his Mac. I did seven illustrations for a book our church is publishing. I provided the illustrations to the graphic designer who is using CS5 and Indesign. He transferred the illustrations to his computer and opened them in CS5 but after making adjustments to them when he attempts to save them he gets a box saying;
“the file is locked or you don't have access privileges to the file or folder”
He also tried saving them BEFORE he made adjustments and has the same problem.
Upon hitting “command i” it shows the file is NOT locked. He tried saving them to PSD, EPS and Layered Tifs and got the same message as above.
I went back to my studio and re-saved the files making sure “maximum compatibility” was checked. Then I saved them again as layered tifs in the Mac byte order. I even took them to an older computer and saved them using Photoshop 7. Still, the designer gets the same message and is unable to save them.
I'm an illustrator and have worked exclusively digitally for ten years and have never had this problem before. The files are layered files and are about 25mb each. There are two things that are different about these files than other files I've created in the past.
I changed the color profile to      Adobe RGB (1998). This was so the image looked the same in CS4 and      in Painter 11. I use both programs to do my painting. Again, this      has never caused a problem and I always do the final save in CS4.
I deleted the “background”      layer before saving the file. This was because the client wanted a      “ragged” edge to the illustration and wanted to drop the image      onto a toned background paper.
I don't see why these things would effect the ability to save the file in CS5, but maybe someone else does.
I'd really appreciate any help on this. The deadline date when the book has to go to the publisher is very close.
pg

Answer 1

Thanks for the reply.
I called the designer and he's putting the files onto a local hard drive. He's running Snow Leopard 10.6.4 and CS5 12.0.2.
My copy of CS4 is current (11.0.2).
I provided the files on a CD, DVD and flash drive.
Thanks again, any further help would be great.
He said he'd repaired the permissions but hasn't rebooted since doing it. He's in a large design department and are currently working on stuff that's keeping him from doing a reboot for a little while.