get error installing/configuring the module

Hi,

After installed the module (trial version v.1.2.1) and put it on a page, I got error message when I clicked on the "Install LuceneSearch" button or the module setting.

I have installed the Aricie Shared module and my DNN is 4.8.3.
I also have the module Document Exchange Professional (DMX) on the same DNN which also use LuceneSearch, can this be the problem?

 

Error message:

[NullReferenceException: Object reference not set to an instance of an object.]
   Aricie.DNN.Security.Trial.TrialController.DisplayMessage(TrialStatusInfo objTrialStatusInfo, PortalModuleBase moduleControl, Boolean isView) +599
   Aricie.DNN.Security.Trial.TrialController.LimitModule(PortalModuleBase& moduleControl, Boolean IsViewControl) +171
   Aricie.DNN.Security.Trial.TrialController.LimitEdit(PortalModuleBase& moduleControl) +44
   Aricie.DNN.Modules.LuceneSearch.UI.ConfigurationInstall.Page_Load(Object sender, EventArgs e) +89
   System.Web.UI.Control.OnLoad(EventArgs e) +99
   System.Web.UI.Control.LoadRecursive() +50
   System.Web.UI.Control.LoadRecursive() +141
   System.Web.UI.Control.LoadRecursive() +141
   System.Web.UI.Control.LoadRecursive() +141
   System.Web.UI.Control.LoadRecursive() +141
   System.Web.UI.Control.LoadRecursive() +141
   System.Web.UI.Control.LoadRecursive() +141
   System.Web.UI.Control.LoadRecursive() +141
   System.Web.UI.Control.LoadRecursive() +141
   System.Web.UI.Control.LoadRecursive() +141
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627

[PageLoadException: Object reference not set to an instance of an object.]
   DotNetNuke.Services.Exceptions.Exceptions.ProcessPageLoadException(Exception exc, String URL) +324
   DotNetNuke.Framework.PageBase.Page_Error(Object Source, EventArgs e) +379
   System.Web.UI.TemplateControl.OnError(EventArgs e) +8689530
   System.Web.UI.Page.HandleError(Exception e) +84
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +6776
   System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +242
   System.Web.UI.Page.ProcessRequest() +80
   System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context) +21
   System.Web.UI.Page.ProcessRequest(HttpContext context) +49
   ASP.default_aspx.ProcessRequest(HttpContext context) +37
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +181
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +75

Hope there's way to fix it, for I really like to try out this module.