running oracle code on asp.net website causes "driver missing" error

running asp.net mvc website that has code that connects to oracle. Works fine on one machine but on another, I get the following Error:

System.Data.OracleClient requires Oracle client software version 8.1.7 or greater.

Here is the line of code that it breaks on:

OracleCommand command = connection.CreateCommand(开发者_Python百科);

This machine that is failing does have the 10.2 version of the oracle driver installed on the machine. Any suggestions on what could be wrong?

Found the same problem (and possible solutions) on asp.net