Hi Veerra,
For above issue solution there is no SAP note. It is basically from experience.
For SAP kernel 7.20 for your IDES system you can look into following link on http://service.sap.com/patches
My Company's Application Components"Complimentary Software"SAP KERNEL 64-BIT UNICODE"SAP KERNEL 7.20 EXT 64-BIT UC
Hope this helps.
Regards,
Deepak Kori