Thanks for your reply.
Actually, we are using voyager for embedded system so cache size is 2M.
Even if I change cache image size to 8096K, it works same.
Other sites works well but our site doesn’t work.

When we excute “voyager” , vcache directory is created at
If I delete existed vcache directory, image files are loaded at first time.
If I reload our site, gif files are not loaded.

I don’t know why?
If you have some ideas, please let me know.

Thanks a lot and best regards,