Cannot access nt shares after a few minutes

[Martin Ortlepp]

Hi,

I´ running samba 2.0.5a and Linux 2.2.5. After smbmount sucessfully mounted my
four nt-shares it lost the connection after 15 or more minutes. I´ve no idea
why. The log reads

smb_retry: signal failed: error=-3

I can remount all shares every 5 minutes but this doesn´t seem to be a good
solution. 

Anyone who has a fix for this?