mof always rejected (veto)

[Johni]

Hello,
I try to develop a simple WMI Instance provider, but my mof file is always rejected (when trying with mofcomp.exe) with the error :
0x8004107a ( WBEM_E_VETO_PUT )
My provider has the property supportsPut;
No method call is made on my code (IWBemServices and IWBemProviderInit).
Any help ?
Thank you.

Here is the mof code :

--------------

#pragma autorecover
#pragma classflags("forceupdate")

#pragma namespace("\\\\.\\Root")

instance of __Namespace
{
Name = "MyCompany";
};

#pragma namespace("\\\\.\\Root\\MyCompany")

instance of __Namespace
{
Name = "MyProduct";
};

#pragma namespace("\\\\.\\Root\\MyCompany\\MyProduct")

instance of __Win32Provider as $XProvider
{
Name = "XProvider";
CLSID = "{00001001-8804-4EE8-88868-36F59DEFD14D}";
ClientLoadableCLSID = NULL;
DefaultMachineName = NULL;
ImpersonationLevel = 0;
InitializationReentrancy = 0;
InitializeAsAdminFirst = FALSE;
PerLocaleInitialization = FALSE;
PerUserInitialization = FALSE;
Pure = TRUE;
UnloadTimeout = NULL;
};

instance of __InstanceProviderRegistration
{
Provider = $XProvider;
SupportsPut = "TRUE";
SupportsGet = "TRUE";
SupportsDelete = "FALSE";
SupportsEnumeration = "TRUE";
};

[
dynamic: ToInstance,
provider("XProvider"): ToInstance,
Description(""):ToSubClass,
UUID("{D99269ED-62A1-42b2-AA59-0768367916B3}")
]
class Data1
{
[
read,
key
]
string Guid;
[
read
]
string Path;
};

[Johni]

Find it...
The CLSID has a wrong format. good error message...
>(