service cannot be reached

Hi,

i made a web service in Abap, and when testing it the message

'Service cannot be reached' appears...

I tried the following things but they didn't work:

- activating the service in transaction SICF --> green status !

- using the IPadress of the SAP server instead of the hostname in the browser

the WDSL definition seems to be there, because when pushing the 'WDSL' button, the xml appears in the browser.

In transaction SMICM, i can see that the http request doesn't come through and gets a warning: connection request failed.

Do i to set up an RFC destination in SM59 for a web service ?

Thanks,

Rolf