Data base connectivity problem

Dear All Hello,

I have created a website, a web service. my web service is on different server my web site is on another and the database is on another server. in the website web.config file i have changed the connection string to the server of the data base. the web service calls the database correctly but when i run my website and try to login it tries to search the database localy and finaly throughs an error. what should i do.