OpenIV Problem

gude
manchmal habe ich das problem, wenn ich texturen mit OpenIV ersetzen will, kommt diese Feherlemdung:Time: "15:19:27"
Type: "EFOpenError"
Message: "Cannot open file "c:\program files\rockstar games\grand theft auto iv\pc\data\maps\manhat\manhat09.img". Zugriff verweigert"

Additional information:
Address: "0x0042643B"
Procedure: "Classes.TFileStream.Create"
Unit: "", Line: "0"

Stack:
[00426436] Classes.TFileStream.Create + $11E
[004262F4] Classes.TFileStream.Create + $20
[004CAE6B] Rage.Archive.TRageArchive.CreateStream (Line 143, "..\..\..\..\Common Units\Rage\Archive\Rage.Archive.pas" + 4) + $C
[005C109B] CoreUnit.TCore.ReplaceFile (Line 492, "System\CoreUnit.pas" + 8) + $A
[005A61F6] DialogsModuleUnit.TActionsModule.actReplaceExecute (Line 944, "Windows\DialogsModuleUnit.pas" + 4) + $34
[0042D9F3] Classes.TBasicAction.Execute + $F
[00494341] Menus.TPopupList.MainWndProc + $1D
[0042E094] Classes.StdWndProc + $14

Sonstiges:
Vista 32
V.1.3