UDF Value is not coming in the query report

Hi all,

i have designed query report based on AR Invoice which has some UDF .

all udf have FMS applied and all these udf has values.

when i run report some times udf values are coming in the report and somtimes not even if udf contains values.

if i open perticular invoice and again update that udf and again run report now udf value will come in the report.

every time i need to manualy update the udf even if that udf contain value.

how to avoide this problem.

Pls suggest solution.

Regards,

Chetan