Disable 'CHANGE' button in CRMD_ORDER

Hi Experts,

I have a requirement, where I need to disable the change button in CRMD_ORDER transaction for only few orders...

am not sure about the disabling the change button, so I tried to disable the fields for input.

I tried to use the function module 'CRM_INTLAY_SET_PROCESS_TYPE' and also other BADIs like CRM_ORDER_AUTH_CHECK, CRM_BTX_EXTENSIONS...but not able to disable the fields completely.

The Conditions tab at the item level is still in change mode...

Appreciate your help on this..

Thanks

Padma.