Sending Parameters to report via hyperlink

Hi...
i am facing a situation where i have to pass parameters to a report (NOT A SUB REPORT) via hyperlink...

Report # 1: RequestSummary (Created from Stored Procedure)
Fields:
ReqestID, ReqDeptName, ServiceName, ReqCostCenter


Report # 2: RequestStatus (Created from Stored Procedure(@Req_ID))
Fields
Request_id, Requestor_Name, Service_Name, Requested_By, Next_Approver_ID, Pending_Since, Status

Now i created a hyperlink on Report#1 requestID field ...

shared Stringvar URL := "ReqStatus.rpt?Req_id=" & {RequestID}

also tried

shared Stringvar URL := "ReqStatus.rpt?@Req_id=" & {RequestID}

also tried

shared Stringvar URL := "ReqStatus.rpt{?@Req_id}=" & {RequestID}

but still same error...

if i simply call report with name with out parameters then it opens...

am badly stuck in it...

am using CR Developer Version 11.5

Please help...
Shahid..