WorkOrder find service not working for workitem

I am totally new to Asset suite system, I am having problem with WorkOrderService_FindWorkOrder service. When I call this service with input parameter(Facility and WorkItem number), its giving me the Invalid value in field Work Item number error.
Please help me.

Thanks a lot
NTL

Can't help

Hi,

Well I'm bummed because I don't have access to a functioning Foundation Architecture.

Jeff