xp pro, outlook 2k3

using sbs2k3 server side and integrated fax services - when client opens a
fax attachment receives an error that outlook could not open the file, if
saving to disk outlook reports that it cannot create the file and to check
permissions. Other PC's have no issues.

if outlook is run in outlook /safe mode everything works perfectly.

i've tried going in normal mode and disabling addin manager and com addins
yet obtain the same error results.

Has anyone come across this?