Query Performance

Hi ,

Query is taking a very long time to execute.With my ID it gets executed within secs.But through Test USer it takes approximately around 45mins.I tried using RSDDSTAT table,I tried debugging through RSRT , even tried through ST05.But I'm not able to find what can be the problem.According to me it should be some authorization proble..Please let me know how to use ST05 trace .I got the trace & somewhere on fetch it is highlighted.then what next .How can i corretc the error.

Regards,

Anita