Cannot find BI master system

Hi everyone,

we are developing bex queries in our BI (NW2004s) system. However, when we create an iview in our Enterprise portal containing such queries we always get the following error when trying to run them.

"The initial exception that caused the request to fail, was:

Cannot find BI master system"

We have our BW system configured into EP under System Administration section.

Every connection test is successfull.

On the other hand, if we run the queries from BW ABAP system using the Java Preview they run ok.

So there seems to be something missing in our EP system...

Has anyone faced this before ?

any help would be appreciated.

Thanks in advance.

Ernest.