am having a bit of a linked server problem .
I created a sql server linked server and it's been working fine for last 2 years and suddenly not working .
SQL Server Microsoft SQL Server 2005 - 9.00.5324.00 (X64) Aug 24 2012 18:28:47 Copyright (c) 1988-2005 Microsoft Corporation Enterprise Edition (64-bit) on Windows NT 5.2 (Build 3790: Service Pack 2)
Oracle client version Oracle - OraClient11g_home1
Cannot create an instance of OLE DB provider "OraOLEDB.Oracle" for linked server
Ps : we have enabled Allow in Process in Sql Server for Oracle Provider
anyone got any ideas on this and what can be done to avoid this happen again