Problem with attaching a copy of DB which is recieved from another server

[ArtemCh]

Hi! I need to move a database from one server to another. So I have the server 'S1', the database 'DB1' which is located on the server 'S1' and the server 'S2'. I use MS SQL Server 2005 Express. I carried out following actions: 1) executed stored procedure sp_detach_db 'DB1' on server 'S1' 2) copied files DB1.mdf and DB1Log.ldf from 'S1' to 'S2' 3) tried to execute the query on the server 'S2':

CREATE DATABASE DB1
ON (NAME = DB1_data, FILENAME = 'file_path\DB1.mdf')
LOG ON (NAME = DB1_log, FILENAME = 'file_path\DB1Log.ldf')
FOR ATTACH

and recieved the error: "Unable to open the physical file "file_path\DB1.mdf Operating system error 5". When I executed the same query on 'S1' to attach DB1 again it was finished successfully... Tell me please what is the source of the error? and how do I solve my problem.

[ArtemCh]

Problem is solved by adding full access permisions for 'MSSQLUser' user group to the file_path directory.