Shouldn't have any problem attaching to a script. There is a permission setting for each user group that indicates if they can add attachments, so check those. There is also workflow code that could be in place to prevent a user from adding an attachment.
If you need more targetted help, you'll need to provide more targetted information.
Before i get deep into what i want, this is what was happening, a group of people had problem with their QC, when they were given a Laptop (was it working fine when they used other system, i dont have the answer)
When they click on attachment link, they have see the file browse and can see it as attached, but when they try to see at the attachments they cannot. That how i understood their problem. Should that be a problem, i never heard about this problem before.
Yes, i would love to have specific information on that.