How to open user query form with Xrm.Utility.openEntityForm?

Hi,

I am using Xrm.Utility.openEntityForm to open entity records in new window. It works fine with some entities, but now I need to open user query and the function doesn't work. It just do nothing, no window is opened, no exception is thrown.

//this works fine
Xrm.Utility.openEntityForm("workflow","A45C0292-DF8B-E111-997C-A0155D8A8410");
//this doesn't work
Xrm.Utility.openEntityForm("userquery","B85C1252-EA84-3101-69AC-11155D8T8317");

What shall I do to open user query form with this function?

Thanks for replies,

Tom