Hi,
As members said above, you should run ATTRIBUTE CHANGE RUN every time you are loading masterdata..It is a MUST..
You may do it in tcode RSATTR..
Anyway, if it still didn't work, try to check the masterdata loaded in your object and data loaded in your providers..Perhaps, either the infoobject or the provider has LEADING ZEROES so your masterdata can't connect to transactional data..
Regards,
Loed