Cannot connect to remote database

I was using IJC just fine on 8/29.  I upgraded on 8/30  (upon start-up) and now I can't connect to our remote database. I am running 5.10.3.  I get a message that I've never gotten before that says "Connecting to database failed:  Instant JChem cannot reach your database server.  Please check your network."  To my knowledge, nothing has changed on our server or network.  Any advice?  I run on a PC.

" To my knowledge, nothing has changed on our server or network."

Please check this statement with a ping <rdbms ip> or tnsping <service/sid> in the case of Oracle.

Thanks,

Daniel.

This is being dealt with external to the forum, I understand...