ABAP Client proxy authentification

Hi,

I created a client proxy via SPROXY that executes a webservice on SAP XI. I also created a logical port via LPCONFIG for the generated proxy class.

In my report i execute the generated method but when execute the report i always get a popup to enter user and password to make the connection to XI.

Is it possible to make a connection without having the popup to enter user and password? Is it possible to use a default user and password?

Thanks a lot,

Vincent.