2.5+autofs-pre10+submount+smbfs expire problems.

Hello.
I've writed "exec map", that submount another autofs with another program map, wich return fstype=smbfs.
I've got tree
autofs

      autofs submount
             smbfs
             smbfs
             ...
      autofs submount
             smbfs
             smbfs
             ...
      ...

I use autofs4 protocol, autofs4 and smbfs compiled staticaly. Expiration problem occur. Smbfs mounts never unmount.
Autofs submounts expire ok, when I don't have third level(smbfs mounts). Log at the end of letter.

May be I've missed something in configuration, but I don't think so. I'll try same on 2.4.20 tonight.

Best regards, Ruslan.

PS: Something wrong with my email and Autofs mailing list, my letters don't appear on the list, but mailman said that I'm subscriber.

automount[9918]: expired /net/spectre-pc//music automount[9900]: expired /net/ghost-pc//Video
kernel: smb_add_request: request [c38bfebc, mid=1784] timed out! automount[9920]: running expiration on path /net/ghost-pc//Video
kernel: SMB connection re-established (-5) automount[9920]: expired /net/ghost-pc//Video
kernel: smb_add_request: request [c38bfebc, mid=1785] timed out! automount[9923]: running expiration on path /net/ghost-pc//Video automount[9923]: expired /net/ghost-pc//Video
kernel: smb_add_request: request [c38bfebc, mid=1786] timed out! automount[9939]: running expiration on path /net/ghost-pc//Video
kernel: SMB connection re-established (-5) automount[9939]: expired /net/ghost-pc//Video
kernel: smb_add_request: request [c38bfebc, mid=1787] timed out! automount[9958]: running expiration on path /net/ghost-pc//Video automount[9958]: expired /net/ghost-pc//Video
kernel: smb_add_request: request [c38bfebc, mid=1788] timed out! automount[9959]: running expiration on path /net/ghost-pc//Video automount[9959]: expired /net/ghost-pc//Video
kernel: smb_add_request: request [c38bfebc, mid=1789] timed out! automount[9962]: running expiration on path /net/ghost-pc//Video
kernel: SMB connection re-established (-5) automount[9962]: expired /net/ghost-pc//Video
kernel: smb_add_request: request [c38bfebc, mid=1790] timed out! automount[9964]: running expiration on path /net/ghost-pc//Video automount[9964]: expired /net/ghost-pc//Video
kernel: smb_add_request: request [c38bfebc, mid=1791] timed out! automount[9980]: running expiration on path /net/ghost-pc//Video
kernel: SMB connection re-established (-5) automount[9980]: expired /net/ghost-pc//Video