Help with DLLs on IIS6 and Oracle database

Scenario:

I work for a software house that also provides online solutions for a whole range of clients worldwide.

All SQL and Functions have been removed from the ASP pages and placed into DLLs to prevent any of our clients editing them. We also only support a windows platform with Access and SQL Server (all versions). We have recently had interest from a client that uses ORACLE database which is no problem. So we have made the online solutions now compatible with ORACLE.

Problem:

The thing is that the online solutions works with ORACLE on an IIS4 and a IIS5 (windows XP Professional) server but on IIS6 all the Sub Procedures in the DLLs work fine but all the Functions in the DLL cause the error of:
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The page couldnt be displayed.

Cannot find server or DNS Error
Internet Explorer
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The strange thing is that in IIS6 I dont get this error when using a SQL Server or access database and they use the same DLLs

Found the problem:

Needed to set the permission on the oracle bin folder
ISUR_(MACHINE NAME)
IIS_WPG