SOBT and VC_BANKDET - change Transport not allowed

Hi,

I'm rookie in SAP and I have small question. In transaction FBZP I can make some changes, but after that it needs a Transport Request. Object is VC_BANKDET. I need stop asking for transport request after some changes. So I started transaction SOBT, mark object VC_BANKDET, click on Change\Display and then I need set Trasport to "Not transport." But problem is that this field is not enabled. Field Adjustment is enablead. I have registered this object and set my Active Key.

Any Idea how can I may change Transport to "No transport"? Need I some special roles or settings for it?

Thanks