EBS from XML Report xml has data but can't display in rtf and output

My report data model using pl/sql package, can genertae xmlf data file , I defined templete using BI Publisher desktop, and linked to concurrent program without any error, but when click view output, I found some columns not data display, but xml file from diagnostics view xml, I can find data, but why not in rtf? who can help me to fix this? many thanks