checking the ABAP connection - error

Hi

According to the ADS config guide for NW2004s, I wanted to test the ABAP connection. I went to t.code SA38, entered FP_PDF_TEST_00 and entered the connection name, and when I execute it I get the error

Error Code: 2

Error Message: ADS

Invalid http conenction: ADS

No version available.

Can anyone please explain me where and how should I set the http conenctions to make this test successful.

Thanks in advance

regards

SM