Your fstab line is close, but the syntax is off a bit.
You can add other options if needed, such as setting uid, gid, or permissions.
//mydestinatedIP/aDirectory /myPreferrablyDirectory cifs username=Admin,password=Admin 0 0
How to fstab - Ubuntu Forums for details.
Last, rather then posting in an old thread (this one is 4 years old from the first post, one year from the last post) start a new thread.
A fair amount changes in 4 years. For example , why do you insist on using the depreciated smbfs ? You should use cifs, works fine, and one day smbfs will stop working altogether as it is depreciated, meaning no longer maintained and you should switch.