Selected Values Disabled in the Query Browoser.

Hi,

     I have taken Bex query as a source. I need to drill down to four levels so in the interaction I have selected the destination cells. I have used query prompt selector. Under the query browser  when I select the second query it has two prompts the first prompt is common for the first query and to the second query. when I try to insert this prompts in the spreadsheet it is showing in selected values. But for the second prompt in the second query the selected values is disabled only insert list of values is enabled. How could I enable selected values.

Thanks

Krishna