Problem running app through RDP file

Hello

I was required to developa a application that generates documents on a ERP program. The application is programmed in C#.
The ERP program have an App launcher, where I can select my app and run it.

One of the app parts is  the reading of an Excel document and I use an using Microsoft.Ace.OleDb.12.0 Connection to  read it.

I had to install the Microsoft Access Database engine on the Server to be able t oread it.
My application runs fine with all the users I tried. I login to the server with the "Remote Desktop Connection" app, launch the ERP and then the App

The ERP is installed on a server out of my control, the admins generates an RDP file for launching the ERP.
From the App launcher my app is launched but it cant read the excel file because it gives an oledb error.

Whats the problem ?
 Lack of permission for accessing the Oledb libraries that enables my program to work ? (Microsoft Access Database engine) ?
Programming related ? ( I dont have any problems if i log in to the server with any user and run the program(even with the same user used within the RDP file)

The server runs Windows Server 2008 R2 Standarat

Thanks in Advance

Rui Cabral