SIA is not working

Hello All ,

i have BI Platform 4.1 and keep giving me this error , when i log in on CMC :

Account information not recognized: Could not reach CMS 'BOBJ:6400'. Specify the correct host and port and check for network issues. (FWM 20030)

Moreover the server intelligent agent service (SIA) Doesn't start and when i click on its configuration it failed to get data base connection string from the system .