I don't have Oracle loaded on my .NET machine right now, but:
Are you using the OleDbConnection class, and not the SQLConnection class? The latter is just for MS SQL Server.
Also, have you installed the latest Oracle client software?
And lastly -- I wouldn't be surprised if it doesn't work -- it's just a beta, after all. The System.Timers class isn't even in there yet.
Chip H.