Remote Error Problem

Hi all,
I created a report that uses resultset generated from integration service. I managed to run the report on BIDS and also by command prompt on both server pc and remote pc. (I created the report from remote pc and deploy the report from remote pc also). When I try to run the report from report server, the following error came up (I already enable remote errors):

An error has occurred during report processing.

Cannot create a connection to data source 'SSIS'.

5 Anyone have any idea how to solve it? or anywhere that I can find the meaning of the 5 below the error message? Thanks in advance.
Darenanyone know the solution to it?
Daren