Unable to authenticate HPSM web service


I need to test out some web services, but whenever i use tools like soap ui, boomerang, postman etc, they all get the response NOT AUTHERIZED

Soao UI asks for username, password and domain, but ive tried all sorts of users but none of them worked. Soap ui then says there is an unecpected character L in the string.

Moreover, my operator has SOAP API capability, and i have tried both web service URL's:

http://<ip_address>:<port>/SM/7   and   http://<ip_address>:<port>:/sc62server/PWS

Kindly advise.