Access Share On XP Box: Safe Mode Networking

I would like to transfer some files from my old XP laptop to my new Vista laptop. All available Windows updates have been applied to both boxes and both boxes are plugged into my Linksys BEFSX41 router. I must boot my XP box in "Safe Mode with Networking" because some unknown startup item has been causing problems. For both boxes, my logon account is a member of the local Administrators group and has a blank password. On my XP box, in Explorer I share the folder "xfer" which contains my files. I grant "Full Control" to "Everyone".

On my Vista box, in Explorer I can see my XP box, but when I double-click on it I get the message:"is not accessible. You might not have permission to use this network resource. Contact the administrator of this server to find out if you have access permissions. Logon failure: user account restrictions. Possible reasons are blank passwords not allowed, logon hour restrictions, or a policy restriction has been enforced."