Hi Tanmeya,
I have checked the user on tcode sldapicust
The user is a system user and when checked via SU01, the sldapiuser is locked due to too many incorrect attempts ( Password logon not possible (too many incorrect attempts).
I guess this is the reason why im getting the error in SLD.
Now I have unlocked it and it is now successfully connected to our SLD.
Thanks for all your efforts..
br,
Marvin