hi , I can not rebuild store module because there are lots of errors when I try do do that .
thee was some refrencese missed I fixed them but there is more error for example :

E:\Documents and Settings\hossein\Desktop\DotNetNuke_3.1.1_Source\admin\Host\HostSettings.ascx.vb(607): 'SchedulingProvider' is not a member of 'Scheduling'.

in this case I guess there is a:
DotServices.Scheduling
and a
DotNetNuke.Services.Scheduling
we need 2nd one but it automatically use 1st one ?! how can I fix it ?

an other example is this :
E:\Documents and Settings\hossein\Desktop\DotNetNuke_3.1.1_Source\DesktopModules\Store\Cart\Providers\GatewayProviders\PayPalProvider\PayPalNavigation.cs(23): The type or namespace name 'Common' does not exist in the class or namespace 'DotNetNuke' (are you missing an assembly reference?)

all refrenses are OK in solution explorer so what is it ??

there are lots of error like these ....

thanks , I had problems Installing dnn 4 but I'll try but dnn 4 (again) and new version of dnn3