Error creating maintenance plan

I'm getting the following error whenever trying to create a new maintenance plan in the Management Studio:

TITLE: Microsoft SQL Server Management Studio

Exception has been thrown by the target of an invocation. (mscorlib)

ADDITIONAL INFORMATION:

Cannot find folder "\Maintenance Plans".

Cannot find folder "\Maintenance Plans".

BUTTONS:

OK

I'm running SQL 2005 SP2 Enterprise Edition, and I have database mirroring configured for all of my non-system databases (3 total). My primary database server is a 2-node cluster. I've tried this from both a remote machine and directly on the SQL server itself, with the same results. Could this have anything to do with the data mirroring? I didn't have this problem previous to setting that up, although I haven't tried creating a maintenance plan in quite a while either.

Here are the error message details:

===================================

Exception has been thrown by the target of an invocation. (mscorlib)

Program Location:

at System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
at System.RuntimeMethodHandle.InvokeMethodFast(Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at Microsoft.SqlServer.Management.DatabaseMaintenance.MaintDesignerMenuHandler.GetExistingPackageNames(String serverName, String userName, SqlSecureString securePassword)
at Microsoft.SqlServer.Management.DatabaseMaintenance.MaintDesignerMenuHandler.Invoke()

===================================

Cannot find folder "\Maintenance Plans".

Program Location:

at Microsoft.SqlServer.Dts.Runtime.Application.GetPackageInfos(String strFolder, String serverName, String serverUserName, String serverPassword)

===================================

Cannot find folder "\Maintenance Plans".

Program Location:

at Microsoft.SqlServer.Dts.Runtime.Wrapper.ApplicationClass.GetPackageInfos(String bstrPackageFolder, String bstrServerName, String bstrServerUserName, String bstrServerPassword)
at Microsoft.SqlServer.Dts.Runtime.Application.GetPackageInfos(String strFolder, String serverName, String serverUserName, String serverPassword)

Try this:

Code Snippet

-- Verify that the folder is missing:

Use msdb;

go

exec sp_executesql N'exec [msdb].[dbo].[sp_dts_getfolder] @.P1, @.P2',N'@.P1 nvarchar(17),@.P2 uniqueidentifier',N'Maintenance Plans','00000000-0000-0000-0000-000000000000'

-- If there is no Folder, then

-- Add the folder if missing:

exec sp_dts_addfolder '00000000-0000-0000-0000-000000000000','Maintenance Plans','08AA12D5-8F98-4DAB-A4FC-980B150A5DC8'

Regards,

Willfried

sql