no response from ADS to Web AS ABAP Web Dynpro request

hello,

we have set up Web AS ABAP and ADS. RFC is established and working. Testreport FP_TEST_00 is running and delivers a version number. We have installed all parts on the client side, i.e. ACF and Adobe 7.0.5. However, when sending a request in order to display a web dynpro ABAP

application including an interactive form UI element the system just hangs and the browser remains blank until timing out.

Also, when starting/displaying an interactive form through SAP Gui(TX sfp, select form and test,

ouput device LP01, display) the Gui locks up.

Any idea, what else we could check or what the cause might be?

Thanks and regards, Ulli