"Could not execute query against OLE DB provider 'MSIDXS'"

Hi,

I am trying to use Indexing Server to search for Arabic contents in
files. First, using Indexing Server, when I write the arabic word and
execute the search, I get the error message: "the query contained only
ignored words". I switched the Locale on the machine to Arabic. It
worked fine.

Now, I have a stored procedure, that uses a linked server to the
indexing server. The stored procedure takes the contents to look for,
and returns a list of files where the search expression was met.
Executing the stored query using the Query analyzer works fine.
However, when I use ADO.NET to execute the query, I get the following
error message:
"Could not execute query against OLE DB provider 'MSIDXS'".

Any ideas?

Thanks in advance,
Sharko