Have you tried IP address of SQL DB server instead of name?
Its communication issue and also make sure that 8731 is open and you can telnet it. And WCF service is installed on ePO server.
And Your SQL DB server should be on same domain as ePO, if I am not wrong.
thx for the answers.
I´ve tried the IP address instead, but the same error occurs. my sql db server is on the same domain as the ePO.
the wcf service is installed and has been tested through http://localhost:8731/DLPWCF/Admin/Testing (this is working).
i am confused
any other suggestions?