FND USER NAME missing in RESOURCE SCREEN( After disabling and activating FND USER ACCOUNT as part of

Hi

As part of R12 upgrade cut over,we inactivated FND USERS during the upgrade period.

we dont want users to access the system,so using scripts,we put an end date to the FND user account.

Once,the cut over period is over,FND user accounts are activated.

Now when we access the resource screen( A resource is associated with user Name in Resource screen),the user name is BLANK(even after activating it)  .

When any of the user access contact center(where there is no user name in Resource setup screen),we are getting errors because of this.