How to update properties set in OPM?

[Anonymous]

That's how i create IPropertySource instance:

gpPropsrc=new CMcPropertySource();
BSTR name = NULL;
gpPropSrc->get_Name(&name);

if(GET_OPM_PERINSTANCE_PROPERTY_SOURCES()->SetPropertySourceAt(&name, gpPropSrc))
    GET_OPM_PERINSTANCE_EXTENSION_PROTOCOL(myObjectType::desc())->AddObjectPropertySourceName(&name);

So, acad calls IPropertySource::GetProperties() and fills OPM when selection of my obect has occured. Then i change some property, and values of other properties is updating. I expect that properties set must be updated too. But it doesn't happen. Sorry for my English.