ASP.net data connection problm

Question

hello there

i am a new developer i just created a simple website project and host it with a free host provider who provide me

asp.net and asp 4.0 and mssql 2008.

i created my project in visual studio 2010 and for database use sql server 2008. and main language is C#.

here i am defining what i have done in my project

1.> first i created two some pages with login control register control and forget password control and  choose

asp.net web application to manage membership.

2.> my asp.net web application shows that sql connection cant estabilished so i found another way

in run command i write ---  c:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regsql.exe

and attach create a aspnetdb n now my asp.net sql server works..

3.> i created my all project and my all project runs very good in localhost

and now my problm is that when i upload this website project in my hosting provider it works good but the

BIG PROBLM IS THAT IT CANT ACCESS THE DATABASE 

PLS guys help me its very urgent..