hi

why i keep getting such errors when i go to settings for a module and click on update!

UserID: 3
UserName: emma
ActiveTabID: 185
ActiveTabName: צור קשר
RawURL: /צורקשר/tabid/185/ctl/Module/ModuleId/561/language/en-US/Default.aspx
AbsoluteURL: /Default.aspx
AbsoluteURLReferrer: http://www.domain.com/%D7%B3%C2%A6%D7%B3%E2%80%A2%D7%B3%C2%A8%D7%B3%C2%A7%D7%B3%C2%A9%D7%B3%C2%A8/tabid/185/ctl/Module/ModuleId/561/language/en-US/Default.aspx
UserAgent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; Avant Browser; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506; .NET CLR 1.1.4322)
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: e3b04db9-fb29-4847-8d53-8dc2323e26cd
InnerException: Object reference not set to an instance of an object.
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: DotNetNuke.Security.Permissions.Controls.ModulePermissionsGrid.GetUsers
StackTrace:
Message: DotNetNuke.Services.Exceptions.PageLoadException: Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object. at DotNetNuke.Security.Permissions.Controls.ModulePermissionsGrid.GetUsers() at DotNetNuke.Security.Permissions.Controls.PermissionsGrid.CreateChildControls() at System.Web.UI.Control.EnsureChildControls() at System.Web.UI.Control.FindControl(String id, Int32 pathOffset) at System.Web.UI.Control.FindControl(String id, Int32 pathOffset) at System.Web.UI.Control.FindControl(String id, Int32 pathOffset) at System.Web.UI.Control.FindControl(String id, Int32 pathOffset) at System.Web.UI.Control.FindControl(String id, Int32 pathOffset) at System.Web.UI.Page.FindControl(String id) at System.Web.UI.Page.ProcessPostData(NameValueCollection postData, Boolean fBeforeLoad) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) --- End of inner exception stack trace