SQL view suddenly timeout expired!!

Hi Experts,

I'm suddenly getting an error "Timeout Expired" when opening a view.
I know earlier in the day it was working fine.
What should I do?

See attached.

Following is the view's SQL.

SELECT     TOP (99.9999) PERCENT dbo.View_OrientSchedOpenFillUnionQry.ID, dbo.View_OrientSchedOpenFillUnionQry.EmployeeID, 
                      dbo.View_OrientSchedOpenFillUnionQry.FacilityID, dbo.View_OrientSchedOpenFillUnionQry.FacilityDate, dbo.View_OrientSchedOpenFillUnionQry.Result, 
                      dbo.View_OrientSchedOpenFillUnionQry.FinalConfirmationYN, dbo.View_OrientSchedOpenFillUnionQry.FinalConfirmation, 
                      dbo.View_OrientSchedOpenFillUnionQry.FinalConfirmationDate, dbo.View_OrientSchedOpenFillUnionQry.FinalConfirmationInitial, 
                      dbo.View_OrientSchedOpenFillUnionQry.FinalConfirmationTime, dbo.View_OrientSchedOpenFillUnionQry.FileApproved, 
                      dbo.View_OrientSchedOpenFillUnionQry.ApprovalStatusDate, dbo.View_OrientSchedOpenFillUnionQry.CompleteFile, 
                      dbo.View_OrientSchedOpenFillUnionQry.CompleteFileDate, dbo.View_OrientSchedOpenFillUnionQry.DocMissing, 
                      dbo.View_OrientSchedOpenFillUnionQry.NotesPayment, dbo.View_OrientSchedOpenFillUnionQry.DateEntered, dbo.View_OrientSchedOpenFillUnionQry.Initial, 
                      ISNULL(dbo.Employeestbl.LastName, '') + ' ' + ISNULL(dbo.Employeestbl.FirstName, '') AS EmployeeName, dbo.Employeestbl.Title, 
                      dbo.Employeestbl.Initial AS HireInitial, dbo.TovInfo.Day AS LastDate, dbo.TovInfo.Facility1, dbo.Facilitiestbl.Name AS FacilityName, 
                      dbo.Employeestbl.ts AS EmployeeTS, dbo.Facilitiestbl.ts, dbo.View_OrientSchedOpenFillUnionQry.HC, dbo.View_OrientSchedOpenFillUnionQry.TableName, 
                      dbo.View_OrientSchedOpenFillUnionQry.reporttype, dbo.View_OrientSchedOpenFillUnionQry.Notes, dbo.Facilitiestbl.County, 
                      dbo.View_OrientSchedOpenFillUnionQry.Staffer, dbo.View_OrientSchedOpenFillUnionQry.SubmittedDate, dbo.View_OrientSchedOpenFillUnionQry.StafferDate
FROM         dbo.View_OrientSchedOpenFillUnionQry LEFT OUTER JOIN
                      dbo.Facilitiestbl ON dbo.View_OrientSchedOpenFillUnionQry.FacilityID = dbo.Facilitiestbl.ID LEFT OUTER JOIN
                      dbo.Employeestbl ON dbo.View_OrientSchedOpenFillUnionQry.EmployeeID = dbo.Employeestbl.ID LEFT OUTER JOIN
                      dbo.TovInfo ON dbo.View_OrientSchedOpenFillUnionQry.EmployeeID = dbo.TovInfo.EmployeeID
ORDER BY FacilityName, dbo.View_OrientSchedOpenFillUnionQry.FacilityDate DESC

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