internal connection without a proxy?

Hello,

we are periodically getting this error on our server. I've done a quick
google and a search on the forums and have not found a simliar error crop up
anywhere. Does anyone know what would cause this error?

- We are using OracleClient/Server 10g

System.InvalidOperationException: internal connection without a proxy?
at System.Data.OracleClient.OracleInternalConnection.ProxyConne ction()
at System.Data.OracleClient.OracleInternalConnection.BeginOracl eTransaction(I
solationLevel il)
at System.Data.OracleClient.OracleInternalConnection.BeginTrans action(Isolati
onLevel il)
at System.Data.OracleClient.OracleConnection.BeginDbTransaction (IsolationLeve
l isolationLevel)
at System.Data.Common.DbConnection.System.Data.IDbConnection.Be ginTransaction
(IsolationLevel isolationLevel)