my team are doing a website using dotnetnuke .All things seem to be smooth .But there is a problem.All we use database call KhuyetTat.I do parts of site ,upload modules to dnn .I stored database at the host and all members in team will use this database.But problem is that, my teammates  can't use this database to work because setting of my computer is stored in database and teammates computer are different from my computer,items such as menu,module...  which i created before can't appear at their computers.What can we do to solver this problems.

firstly,great thanks to Sebastian Leupold.My friend can access the home page of dnn .But new problem emerged.He can't use any function in home page.For example ,when he click on login link, dnn report that .....
Server Error in '/' Application.
The resource cannot be found.
Description: HTTP 404. The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable.  Please review the following URL and make sure that it is spelled correctly.
Requested URL: /DoNetNuke1/Login.aspx
this message happen again when he click on menu items .In short ,apart from accessing home page,he do nothing else.
i add alias that her computer can use to access in table of PortalAlias in database localhost/KhuyetTat .i may need to change more than that .please help me solve problem because the deadline is coming and we failed to integrate application . 

firstly ,great thank to Sebastian Leupold .My friend can access the home page of dnn .But new problem emerged .He can't access any fuction at home page .for example ,he click on link log in ,then dnn redirect him to new page ,and at new page ,error is reported like below
Server Error in '/' Application.
The resource cannot be found.
Description: HTTP 404. The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable.  Please review the following URL and make sure that it is spelled correctly.
Requested URL: /DoNetNuke1/Login.aspx
Version Information: Microsoft .NET Framework Version:2.0.50727.3053; ASP.NET Version:2.0.50727.3053
the problem happened again when he click on any menu items.I add portal alias to table of PortalAlias in database to help him access home page .And that is allthings i do .I may to need add more than that to database .Please ,can you tell me more detail about problem and help me solve it.Our deadline is comming and we failed to integrate application.