Problem about Resource in Resource View

[Basim]

Hi,

One resource is working on different projects .
but in one project the problem is creating for him.
because everytime I publish the tasks to this user spooler error is creating
.. and when I see the resource view the windows user account information is
empty.I entered the information and publish the tasks problem is resolved .
but after some days the same problem is again repeated.

Please tell me the solution.

Regards

Basim Alvi