I am working on a C# web service.

I have deployed a web service which is working perfectly on my local system but when I try to run the same service on my virtual dedicated server it is returning an error.

This is my connection string

```
Data Source = <serverinstance>\\SQLEXPRESS; Initial Catalog = DomainTable; User ID= <serverinstance>\\admin; Password = <Windows_Login_Password>

```

Before this I was using this connection string

```
Data Source=<serverinstance>\\SQLEXPRESS; Initial Catalog=DomainTable; Integrated Security=SSPI";

```

None of them is working for me. please help its really really important