smb4k on Ubuntu

smb4k does not work well on Ubuntu, but it is Ok with Fedora. When I try to mount my Windows share folder, I get this error:

smbmnt must be installed suid root for direct user mount.

I use google to know how to fix. Here is the command:

$ sudo chmod u+s `which smbmnt`
$ sudo chmod u+s `which smbumount`