Error in remote connection with sql express 2005

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Hi Expert

I am working with a project in c# vs.net 2005 and sql express as backend. I have successfully completed the works. I want to connect my application and SQL Express on LAN. I have successfully connected the database one day before but because of some problem I have formatted the hard-disk on both client and server machines.

My application is throwing this error:

Create databse permission denied in database 'master'.
An attempt to attach an auto named database for file
C:\myDB.mdf failed.
a database with same name exist , or specified file cannot be opened, or is located on UNC share.

In this regard I have some questions.

1. Is there any way to create a login without using sql management studio. Using this query "CREATE LOGIN user WITH PASSWORD='pwd'"
It executes successfully but gave this error:

"Login failed for user user. the user is not associated with a trusted sql server connection"

2. If I login with Windows authentication then I receive this error:

Create database permission denied in database 'master'.
An attempt to attach an auto named database for file C:\myDB.mdf failed.
a database with same name exist , or specified file cannot be opened, or is located on UNC share.

What is the problem with my application?
thnx

Posted 6-Jul-11 6:32am

kachura

Updated 7-Jul-11 1:02am

Slacker007

v2

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Comments

wizardzz 6-Jul-11 12:40pm

Not sure, but that sounds like a botched install. If there is no data, is reinstalling SQL an option?

Emrah Taylan 6-Jul-11 16:46pm

Have u tried with 'sa' user?

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sachin10d · Accepted Answer · 2011-07-07T00:55:00

I think this should work,
1. execute the following statement
start>>Run>>CMD
"osql -S <SQL InstanceName> -E"

"alter login sa enable"
"go"

"alter login sa with password='pwd'"
"go"

2. check the file myDB.mdf in sqlserver installation path
stop the sqlserver services delete the myDB.mdf file and try again.