Siebel CRM IP16 -> GetProfileAttr("Login Name") not working on asynchronous WF call

Dears,

In the Workflow, there is a step that reads the current logged in users First Name, Last Name, Login Name, etc.

We are trying to call a Workflow asynchronously using "Server Requests" BS, but the GetProfileAttr("Login Name") returns NULL. Whereas when the same Workflow is invoked from the Client, it fetches the correct information (Last Name, First Name, Login Name, etc)

1. We have checked the Workflow component parameters, but could nt find any related parameters.
2. Checked the Workflow component's cfg file, EnablePersonalization = TRUE

This issue is happening only in PROD environment, but it is working fine in lower environments.