Read-only attribute - how to make it changeable?

Hi,
I'm new to CRM 7.0 and I have a problem with an attribute.
I have table view which is displaing one model node. I've added new attribute to this model node, which is value attribute.
Now I would like to change value of this attribute from get_ method but it's not possible. I checked IS_PROPERTY_READONLY and it's 'X'. How can I change property of this attribute to changeable?
I've found some answers on SDN but it was not complete or not working.
Thanks for any help,
Szymon

Thanks for reply.
But it's not exactly what I meant. I'd like to change the attribute value not from typing in web ui, but setting it in get_attribute method.
Now I have code like this:
DATA: lr_row TYPE REF TO cl_crm_bol_entity,
is_ro TYPE abap_bool.
lr_row ?= me->collection_wrapper->get_current( ).
is_ro = lr_row->IS_PROPERTY_READONLY( IV_ATTR_NAME = 'NO_COPY' ).
lr_row->set_property_as_string( IV_ATTR_NAME = 'NO_COPY' IV_VALUE = 'X' ).
When checking IS_PROPERTY_READONLY - it's true. So setting property for attr 'NO_COPY' is not working (but if attribute was initial it's working - IS_PROPERTY_READONLY results false and value for attribute is set).
I've found on the SDN earlier:
Check the method SET_ATTR_PROPERTIES( ) in the class CL_CRM_GENIL_SAMPLE_ABSTR where you can perform the changes for that fields that you don't want to be readonly. Or else you can modify the properties in this method IF_GENIL_APPL_MODEL~GET_OBJECT_PROPS.You can return the properties which you want to.
But I don't know how to use this class/interface...
Regards,
Szymon
Edited by: Szymon on Mar 2, 2012 8:17 AM

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