Duplicate/create a new workflow for Requirements error

Hello,

We are currently using RQM 2.0.1 iFix3 with Oracle 11G DB.

When we are trying, using RTC client, to duplicate or create a new workflow for Requirements (similiar to the existing one named "Authoring Workflow") and then binding Requirements to this workflow, we have a strange behaviour :
All status of requirements are now "authoring.s(x)" (Where x is a number)...and can't be modified.

Did we missed something ?
Do we need to change directly and only the existing "Authoring Workflow" ?

For information, creating or duplicating a workflow for Defects is working perfectly.

Thanks for your help and advices.

Best regards,
Jrmie