Problem with exec / IDM_PRINTPREVIEW

Hi,

I have an application that display a custom preview (using a print template) before printing.
The preview is launched from an ActiveX using the method commandTarget->exec(&CGID_MSHTML, IDM_PRINTPREVIEW, OLECMDEXECOPT_DODEFAULT, &templatePath, NULL); (command target is pointer to an IOleCommandTarget).

All works fine in IE8 and IE9 but since we changed for IE11 the methods works "sometimes".

Thx for any reply