I don't know if this will help or not, but I just scraped the following out of the default JDBC preferences in SoapUI Pro (ReadyAPI!) for mssqlserver
jdbc:sqlserver://<HOST:127.0.0.1>:<PORT:1433>;databaseName=<DB>;user=<USER>;password=<PASSWORD>
It also looks like your port is 1435 - rather than 1433 - I'm just asking just in case.
I've had a lot of problems with connecting to several different databases in SoapUI cos of the connection string you need to use - there are normally alternatives defined out there, depending on the tool you're using and what variables you want to specify in the string.
Anyway - I don't know if this will help, but if it doesn't google the mssqlserver thin driver connection strings and you'll see several alternatives.
Cheers,
richie