Javascript error: wdaOnMainLoad is undefined

Hello together
I'm reading the SDN for quite a while now, and thanks to all of you most of my problems could be solved. So I hope there is anybody who knows a solution to my current problem with WebDynpro for ABAP.
On our development machine everything works fine, but when it gets to the test and production systems, nothing WebDynpro related works, even the SAP demo applications don't load. All I got is a blank browser page and the following Javascript error (as shown in the thread title):
wdaOnMainLoad is undefined
This happends regardless of the browser I'm using, Internet Explorer as well as Firefox. I really don't know, how to solve the problem, or even to track the source of this error. The machines are all new with ECC 6.0 as far as I know.
EDIT: I just forgot to mention, that I searched SDN and Marketplace for this problem, but I didn't found anything. There are some SAP Notes though (1266588, 1417118, 1454373) that seem interesting, but nothing is related exactly to my problem.
Edited by: Sebastian Raffel on Jun 27, 2010 6:19 PM

Sebastian,
Make sure all the configurations are properly done
http://www.docstoc.com/docs/14973999/Web-Dynpro-ABAP-Configuration/
http://help.sap.com/saphelp_tm70/helpdata/en/43/e86de5008b4d9ae10000000a155369/content.htm
Thanks
Bala Duvvuri

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