Samba and filenames problem

[Vit]

Hi all!
I've got problem.
On Windows PC I've got file called "CH3CN+2.5%Fer.doc". When I try to acess
this pc through samba, I have "File does not exist:
smb://balls/D/CH3CN+2.5%25Fer.doc" error and the directory is not even
listed. (From toher Windows it's ok).
Could any one describe a solution? File rename is not the solution ;)
Sincerely yours,
Vit