Remote Logon doesn't work.

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Hi

In order to work with the backend system R/3 e.g. to call Function modules

or for follow up documents etc. there is a rfc user needed.

I have created one user RFCALEX (Usetyp Dialog) at the backend and passed

him the following Profiles SAP_ALL and SAP_NEW due to SU01.

I also have created a an RFC-Connection (SM59) on the SRM side to the Backend side

(Connection Type 3) have established all Technical Settings and

passed the user RFCALEX this RFC-Connection.

And now in the SRM when I call a backend function module

with the addition DESTINATION I get always the Logon Panel.

Although there is user given inside RFC-Connection (RFCALEX)

together with his password the Logon Panel pops up.

I have tried other Usetyps like Service and System a.s.. It was the same

as before. The "Connection Test" in the SM59 works well.

No error message.But Remote Logon doesn't work.

What do you think what could be wrong here.

Regards

Alex