Pass DATA_PARAMETER to Report in 10g

Question

I have a form which will pass a Record Group to the Report as a parameter list, it works in 6i but when I migrate to 10g,
the report cannot be run.
In the Form :
A record group named 'Q_QUERY'with 2 columns named 'APPLY_AGT' & 'STATUS' was built and populated.
l_Param_Name := 'Q_QUERY';
l_Param_Value := 'Q_QUERY';
add_parameter (l_PARMLIST_ID, l_Param_Name, DATA_PARAMETER, l_Param_Value);
Then will call the report using RUN_REPORT_OBJECT
And just before calling the report , I am sure the data is already in the Record Group.
In the Report :
A Queries named 'Q_QUERY' as the Data Source
And there is just 2 columns named 'APPLY_AGT' & 'STATUS'
If I run as above, the system will show "Unable to Run Report".
If I removed the "add_parameter (l_PARMLIST_ID, l_Param_Name, DATA_PARAMETER, l_Param_Value);" statement,
the report can be called successfully.
Am I missed something or it really can't do this in 10g ?
Fyi, I have checked the TEXT_PARAMETER can be pass to report successfully, just DATA_PARAMETER can't.
Please help, thanks!

Answer 1

Use the following URL to see the exact reprt error in the server:
"http://*rep_server:portno*/reports/rwservlet/showjobid*XXXX*?server=*rep_server*&statusformat=xml"
just replace the words between *s  with their values. It will give u an idea as to what went wrong.