interop excel print

[Guest]

I try to print via interop.excel
I have no problem since when i change the landscape property.
The system gives me un unswer that is not able to change the property because there's not a printer
I fooow the microsoft suggest about printer setup for .defaul user in teh system registry but not is changed
I use dcomcnfg too inserting the group "Guest".... always the same problem

Ho can help, me