'OraOps9.dll': Access is denied

[SteveNH]

I am getting the above error from two machines when attempting to
connect to Oracle:

OracleConnection connection = new OracleConnection(connectStr);

This used to work fine on one of these machines. I always got this
error on the other machine. I have given ASP.NET and Authenticated
Users (and just about everybody else!) read/execute permissions on the
Oracle\Ora92 directory (ORA_HOME) as directed by other posts I've read
on various forums to no avail.

What is particularly puzzling is that it used to work fine on one of
these laptops and now it doesn't.

Ideas, anyone?

 

[Jeff Dillon]

Change any passwords lately?

 

[SteveNH]

Nope, and PL/SQL Developer still works on both machines.