OPENQUERY from the ASP.NET page problem?

[savvy]

I'm performing a particular word Search in MS Word, Text, PDF docs and
displaying the results through Index Server linked to SQL Server when
it is matched. For which I'm using Openquery in the stored procedure
which works fine in Query Analyzer of the SQL Server but doesn't work (
shows none of the results) when i call it from the ASP.NET Page. I am
not able to figure out Where and What is the problem?
The Stored Proc which is i'm using is shown below
Any help will be greatly appreciated. Thanks for your time and help in
Advance

CREATE PROCEDURE SelectIndexServerCVpaths
(
@searchstring varchar(100)
)
AS
SET @searchstring = REPLACE( @searchstring, '''', '''''' )
IF EXISTS (SELECT TABLE_NAME FROM INFORMATION_SCHEMA.VIEWS WHERE
TABLE_NAME = 'FileSearchResults')
DROP VIEW FileSearchResults
EXEC ('CREATE VIEW FileSearchResults AS SELECT * FROM
OPENQUERY(FileSystem,''SELECT Directory, FileName,
DocAuthor, Size, Create, Write, Path FROM
SCOPE('''' "c:\inetpub\wwwroot\sap-resources\Uploads" '''') WHERE
FREETEXT(''''' + @searchstring + ''''')'')')
SELECT * FROM CVdetails C, FileSearchResults F WHERE C.CV_Path =
F.PATH AND C.DefaultID=1
GO

which works with followin stat in Query Analyzer
Exec SelectIndexServerCVpaths
@searchstring = 'The Search text'

but doesn't work when i connect it a Datagrid in my ASP.NET Page
objcmd = new SqlCommand("SelectIndexServerCVpaths", objConn);
objcmd.CommandType = CommandType.StoredProcedure;
objcmd.Parameters.Add("@searchstring",strsearchstrings);
objConn.Open();
objRdr = objcmd.ExecuteReader();
dgcvs.DataSource=objRdr;
dgcvs.DataBind();
objRdr.Close();
objConn.Close();