Error in object link generation

We've created our own roles in EP and CRM correspondingly, and done the linking and copying in configuration for PC-UI. For some reason, the object link generation (OLG) does not work correctly. When we click on the hyperlink of, for example, an account, the portal launches a new window and calls the URL

roles://portal_content/(the path to our role)/.../(iview ID)?DynamicParameter=CRM_OBJECT_TYPE...

In other words the URL is completely wrong. The part http://(portal server):(port)/irj/... is not there. The URL the portal tries to call is simply the entry ROLES://(pcd locator) from the customizing table CRMC_PRT_ROLE_MO

Our portal is 6.0 SP2 and the CRM is 4.0 SP7.

I've applied note 659881, so the URLDispatcher should be right.

Anyone ran into this problem before?