Hi Joe,
At first please make sure your role has the rights to attach a file, in Collaboration we have below roles can do this:
*Document Editor (Level 1)
*Document Editor (Level 2)
*Administrator
You can assign role to specific user from:
*Vault Collaboration Client
Tools->Administration, Security tab, Users
*ADMS 2010
Tools->Administration, Security tab, Users
And then you can modify the permission of that file or folder from Vault Collaboration main menu:
File->Properties, Security tab
Hope this helps,
-Dicky
Dicky Shu
SQA Engineer
PSEB-GE-ACRD PSEB
Autodesk, Inc.