Invalid WDA item link generated from Extended Notifications

[Baba Jammi]

I trying to launch WDA item for Leave Request EHP5 thru extended notifications link in outlook email.
 
SWN_SELSEN does cerate a link in the email as 
 
"Execute Work Item: Invalid Link (SWN155)". 

Below some information about configuration I have done.

I have maintained WD_HOST as http://---.---.com:1081/sap/bc/webdynpro/ as suggested by earlier posts.
 
Below workflow configuration has been done in SWFVISU for the Leave Request Approval task.
 
APPLICATION#HRESS_A_PTARQ_LEAVREQ_APPL
DYNPARAM#LRF_REQUEST_ID=${item.REQUESTID} 

Appreciate if someone can suggest what else configuration I am missing.
 
Thank you,
Baba Jammi
SAP Workflow Consultant
Aramco Services Company
9009 Westloop S
Houston, TX
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