PDF download is not working after migrating WDJ code from 7.02 to 7.31

Hi Expert,

I have migrated WDJ code from 7.02 to 7.31.After migration PDF download is not working as expected.

I used following code to create PDF.

l_pdfResource = WDResourceFactory.createResource(wdContext.currentContextElement().

getAttributePointer(IPrivateCompletionPopUp.IContextElement.CTX__RESOURCE_ON_DEM_STREAM), l_str_fileName, WDWebResourceType.PDF);

I am  getting following link while trying to open PDF.

http://xxxxxxxxx/webdynpro/dispatcher/xxxxx/xxxxxxx/xxxxxx/~wd_cache_/~wd_key_fSoMiCOKzblKgtRm/Approval_2014-10-22_19565656.pdf?sap-wd-download=1&sap-wd-cltwndid=ac535acf59dc11e4c1c800000055d607&sap-wd-secure-id=OgSgFTUYQOmEVOCfsCvF0w%3D%3D&sap-wd-appwndid=ac535ad059dc11e4916200000055d607&sap-wd-norefresh=X

And also getting following pop up in that link.

Can you please help me to fix the issue.

Thanks,

Patralekha