Debug Hierarchy user exit ZXRSAU04

Hi BI Gurus,

I am following the link below to create customized hierarchy in BI but the hierarchy data load return error.

http://www.element61.be/e/resourc-detail.asp?ResourceId=189

How can I debug the hierarchy user exit ZXRSAU04?

I have set the breakpoint in ZXRSAU04 and in the detail tab of monitor screen for the infopackage, right clicking on the data package node and click 'simulate update'. However it didnt enter the debugging mode.

BW User Exit at R/3

What is the correct steps to debug hierarchy user exit ZXRSAU04 in BW? Kindly advice.

Thanks.

Best regards,

Pei Fung