WorkItem Query Problem

Hi,
I have implemented a checkbox in my workitem . When I am running a query to search the workitem based on the selection made during submitting the workitem , It is not able to serach any workitem.
Can the workitem team give some clarity on how to implement the query for multiselect checkbox.
Thanks in Advance
Pranav
I have implemented a checkbox in my workitem . When I am running a query to search the workitem based on the selection made during submitting the workitem , It is not able to serach any workitem.
Can the workitem team give some clarity on how to implement the query for multiselect checkbox.
Thanks in Advance
Pranav