Hi,
I suppose all settings are made for debugging a xsjs application as described in the developer guide (assignment of roles, granting privileges). If yes then you are probably on a revision like 1.00.112.02.
In this revision I am facing the same issue as you. I opened an OSS ticket (170067 / 2016) that is currently processed by SAP support. No info until now how to fix it
BR
Christian