An unexpected error occurred and your request couldn't be handled.

i get the following error after my exchange server was broke. i created a VM and did a BMR restore. i also did an exchange restore everything is working fine except in OWA when the email has an attachment the following error occurs.
 
An unexpected error occurred and your request couldn't be handled.
________________________________________


Request
Url: https://mail.mydomainname..com:443/owa/forms/premium/ReadMessage.aspx?ae=Item&a=Open&t=IPM.Note&id=RgAAAABoEXGfJ6AxTLy6LTztKh%2fQBwAJhFb9Gh7HTaJ1cuIv39woAAABJyp8AABwsZQk7Hf7R7vY3037GM3LAAAnATfaAAAJ&pspid=_1382291017666_899977701
User host address: 192..x.x.x
User: My Name
EX Address: /o=domainname/ou=first administrative group/cn=Recipients/cn=jtovar
SMTP Address: email@mydomain.com
OWA version: 14.0.722.0
Mailbox server: server.mydomain.local

Exception
Exception type: System.IO.FileNotFoundException
Exception message: Retrieving the COM class factory for component with CLSID {78E40D5F-0C51-45B6-AC87-72119EC6669A} failed due to the following error: 8007007e.

Call stack
System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandle& ctor, Boolean& bNeedSecurityCheck)
System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean fillCache)
System.RuntimeType.CreateInstanceImpl(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean fillCache)
System.Activator.CreateInstance(Type type, Boolean nonPublic)
Microsoft.Exchange.Security.RightsManagement.Protectors.ProtectorsManager.LoadProtectors()
Microsoft.Exchange.Security.RightsManagement.Protectors.ProtectorsManager.get_Instance()
Microsoft.Exchange.Clients.Owa.Premium.Controls.AttachmentWell.RenderAttachments(TextWriter output, AttachmentWellType wellType, ArrayList attachmentList, UserContext userContext, Boolean isConversationAndIrmCopyRestricted)
Microsoft.Exchange.Clients.Owa.Premium.Controls.AttachmentWell.RenderAttachmentWell(TextWriter output, AttachmentWellType wellType, ArrayList attachmentList, UserContext userContext, Boolean renderEmptyWell, Boolean isConversationAndIrmCopyRestricted)
Microsoft.Exchange.Clients.Owa.Premium.Controls.AttachmentWell.RenderAttachmentWell(TextWriter output, AttachmentWellType wellType, ArrayList attachmentList, UserContext userContext, Boolean isConversationAndIrmCopyRestricted)
Microsoft.Exchange.Clients.Owa.Premium.Controls.AttachmentWell.RenderAttachmentWell(TextWriter output, AttachmentWellType wellType, ArrayList attachmentList, UserContext userContext)
ASP.forms_premium_readmessage_aspx.__Render__control1(HtmlTextWriter __w, Control parameterContainer)
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)
System.Web.UI.Page.Render(HtmlTextWriter writer)
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)