Mail Merge Button in ASP-Page

SOLVED

Hello,

I found this article on the CRM Accelerator help pages, where it is stated that you can perform a mail merge on a specific document via a "one click button": http://accelerator.crmtogether.com/index.php?title=Custom_Mail_Merge_App. I want to create an ASP Page that has this Buttons as an integration. The goal is to perform a wordMerge with as less cklicks as possible. The problem however, is that I am getting error 500, ehen integrating below code in my ASP Page: 

MergeContainer.AddButton(CRM.Button("Angebots","edit.gif","custommailmerge:****/CustomPages/Policy/PolicySummary.asp?mpol_PolicyID="+UseId+"&SID="+_sid+"&F=&J=Policy/PolicySummary.asp&Key0=58&ctfunc=opt_MailMerge&ctdoc=17144", "Policy", "EDIT"));

"Anbgebot" should be written on the button, **** is the address to my server, opt_MailMerge is the WordMerkge Function and 17144 the libraryID of the document. Could the reason this part is not working be, that the folder "policy" with its "policySumarry.asp" does not exist in my "Custom Pages" Folder? How can I make this method working?

Thank you for any help!