Clicking on Tasks in UWL opens URL with DynamicParameter value wi_id is NULL

Dear Experts,

I am able to get wd_id ( DynamicParameter ) value in UWL , but on clicking the Iteam link UWL opens URL in separate tab in that wi_id value is NULL.

Clicking on Tasks in UWL opens URL with NULL DynamicParameter workitem ID

We have done the below:

SWFVISU:

APPLICATION       ZWD_HCM_LoanApp

DYNPARAM          wi_id=${item.externalID}

NAMESPACE        sap

SYSTEM_ALIAS    SAP_ECC_HumanResources

UWL reregister and clear cash.

But on click on the task the application open but DynamicParameter value is not passing Null in to URl.

The url of the Loan task is as follows:

http://<host>:<portno>/irj/servlet/prt/portal/prtroot/pcd!3aportal_content!2f every_user!2fgeneral!2fdefaultAjaxframeworkContent!2fcom.sap.portal.standalonecontentarea?NavigationTarget=ROLES%3A%2F%2Fportal_content%2Fevery_user%2Fgeneral%2Fuwl%2Fcom.sap.netweaver.bc.uwl.uwlLaunchWebdynproABAP&DynamicParameter=%26wi_id%3Dnull%26System%3DSAP_ECC%26WebDynproNamespace%3Dsap%26WebDynproApplication%3DZWD_HCM_LoanApp&System=SAP_ECC&WebDynproNamespace=sap&WebDynproApplication=ZWD_HCM_LoanApp&PrevNavTarget=navurl%3A%2F%2F56c1b083f59f7a7642ede3ffb4b06f2b&NavMode=1&CurrentWindowId=WID1430722117646

Where do i change the link. Kindly help.