Server attribute in jasper report

Hi,

I have created a simple report on jasper studio which has 3 columns.

Select a,b,c from dbo.[XYZ]

where B= $P{Attribute_B}

I have created paramter Attibute_B on main and table data set level and also have defined it on jasper server.

But when I publish and run the report on Jasper server, the report gives me a blank output.

Could not understand what am I missing here