Strange Error ........ ??? help needed please.

I had one module called ImagineNews that retrieves news from the database, the module was working fine for past one year. Now just at sudden the module not working and giving the following problem:

An error has occurred.
Error: ImagineNews is currently unavailable.

and I would like to inform that no any updates or changes been done in this period, the only thing it was routine news posting through this module. I tried to read similar error on the internet and most of them showing that this error occur while updating or migration ... etc.

Any how I'm also posting here the Event log for any help :

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ModuleId: 478
ModuleDefId: 120
FriendlyName: ImagineNews
ModuleControlSource: DesktopModules/ImagineNews/ViewImagineNews.ascx
AssemblyVersion: 5.4.0
PortalID: 0
PortalName: portal
UserID: -1
UserName:
ActiveTabID: 65
ActiveTabName: News
RawURL: /Default.aspx?tabid=65&language=en-US
AbsoluteURL: /Default.aspx
AbsoluteURLReferrer:
UserAgent: Mozilla/5.0 (iPad; U; CPU OS 4_3_3 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8J3 Safari/6533.18.5
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: 00e75c72-785a-4051-9fd0-4ca803e6bf5e
InnerException: Object reference not set to an instance of an object.
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: Imagine.Modules.ImagineNews.ViewImagineNews.GetFilePath
StackTrace:
Message: DotNetNuke.Services.Exceptions.ModuleLoadException: Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object. at Imagine.Modules.ImagineNews.ViewImagineNews.GetFilePath(String fileid) at Imagine.Modules.ImagineNews.ViewImagineNews.GetURL(String fileid) at ASP.desktopmodules_imaginenews_viewimaginenews_ascx.__DataBind__control14(Object sender, EventArgs e) at System.Web.UI.Control.OnDataBinding(EventArgs e) at System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) at System.Web.UI.Control.DataBind() at System.Web.UI.Control.DataBindChildren() at System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) at System.Web.UI.Control.DataBind() at System.Web.UI.WebControls.Repeater.CreateItem(Int32 itemIndex, ListItemType itemType, Boolean dataBind, Object dataItem) at System.Web.UI.WebControls.Repeater.CreateControlHierarchy(Boolean useDataSource) at System.Web.UI.WebControls.Repeater.OnDataBinding(EventArgs e) at System.Web.UI.WebControls.Repeater.DataBind() at Imagine.Modules.ImagineNews.ViewImagineNews.FillRepeater() at Imagine.Modules.ImagineNews.ViewImagineNews.Page_Load(Object sender, EventArgs e) --- End of inner exception stack trace ---
Source:
Server Name: WEB2
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Any guidelines and help please.