nopCommerce 2.4 installation Fail !

when i got my Deployable\nop_2.40 directory into my server(host), and refresh my URL. The istall step begin, but i got error in install process(i just have database in host) :

"                                               nopCommerce installation

To complete this wizard you must know some information regarding your database server ("connection string"). Please contact your ISP if necessary. If you're installing on a local machine or server you might need information from your System Admin.
Setup failed: System.InvalidOperationException: Sequence contains more than one element at System.Linq.Enumerable.Single[TSource](IEnumerable`1 source) at System.Data.Objects.ELinq.ObjectQueryProvider.<GetElementFunction>b__3[TResult](IEnumerable`1 sequence) at System.Data.Objects.ELinq.ObjectQueryProvider.ExecuteSingle[TResult](IEnumerable`1 query, Expression queryRoot) at System.Data.Objects.ELinq.ObjectQueryProvider.System.Linq.IQueryProvider.Execute[S](Expression expression) at System.Data.Entity.Internal.Linq.DbQueryProvider.Execute[TResult](Expression expression) at System.Linq.Queryable.Single[TSource](IQueryable`1 source) at Nop.Services.Installation.InstallationService.InstallSettings() in d:\WORKING\Shop.YTCN\Libraries\Nop.Services\Installation\InstallationService.cs:line 4533 at Nop.Services.Installation.InstallationService.InstallData(String defaultUserEmail, String defaultUserPassword, Boolean installSampleData) in d:\WORKING\Shop.YTCN\Libraries\Nop.Services\Installation\InstallationService.cs:line 9409 at Nop.Web.Controllers.InstallController.Index(InstallModel model) in d:\WORKING\Shop.YTCN\Presentation\Nop.Web\Controllers\InstallController.cs:line 429"

i think i have problem with my connectstring, but i can't find it in project, so, what can i do ? Help me ?

https://www.nopcommerce.com/boards/t/13524/need-help-installation-of-nopcommerce-v-230.aspx

a.m. wrote:

Can i create fresh new DB in my host and start install ? thank in advance !

lieudd wrote:
???
Yes, why not?

Hi every one,
if you have the same problem like me, you should create new fresh DB, and start install, i will be successful.

a.m. wrote:
i mean with my running DB in my localhost, but can't use it in the HOST, i have to create new DB and install again.
it should be oke now,  thanks you

Will you please explain us that where to place the database connection string in v2.4? As on previous versions there is a file called settings.txt in app.data. Thanks in advance