[asterisk-users] users.conf SIP registration fails

[0xception]

I recently upgraded from asterisk 1.2.13 to 1.4.2 and am looking at using
the users.conf file to setup my users, before i was using real time SIP
which worked fine. However when i create a user in users.conf i am unable to
register the user form a softphone, however that same softphone can still
register a different the users i currently have setup form the sip.conf from
real time. i've recieved different error messages at different times but
none of them stick and i can't seem to reproduce much of them. (for example
for a while i was getting host=dynamic not found/known errors. then i was
getting something about disallow errors, now i dont receive any errors but
when i turn on sip debugging it just say unauthorized.

below is my users.conf file

[6058]
allow = all
callwaiting = yes
cid_number = 6058
context = default
email = user at mydomain.com
fullname = Bob smith
group =
hasagent = yes
hasdirectory = yes
hasiax = no
hasmanager = no
hassip = yes
hasvoicemail = yes
host=dynamic
mailbox = 6058
secret = myPassword
threewaycalling = yes
vmsecret = 1337
zapchan =
registeriax = no
registersip = yes


Any idea why this doesn't work but registering normal SIP configured
accounts does?
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