samba - Jan 2003 - problem with koi8-u

Hello!
Are Not displayed it is correct letters of the ukrainian alphabet 'i'
& 'I'.
I use:   smbmount //w2kserver/share /mnt/net -o
username=user1,iocharset=koi8-u,codepage=cp866.
My System is:   RedHat8.0, locale=koi8-u.  
What solve a problem?
Senks !