B1 integration error; Connect to Business One failed. (-4008) Login SLD Failed,

Whenever trying to test connection on B1DI in SLD section of Integration Framework, it is throwing this error, whereas the entered credentials are correct. com.sap.b1i.adapter.dia.exception.ConnectionFailedException: Connect to Business One failed. (-4008) Login SLD Failed, make sure the server, company and user credential are correct

I tried change b1i users password. Notting happen. I'm sure my sa password correct. But it dosen't connect to SBO-COMMON(B1DI). I tried a lot of thing.

I looked into it in the community, but I couldn't find a solution. I'd like your help.