Issuing Word Commands From Excel Macro

I am trying to build a word document from an excel macro (with some success) and I am running into some issues with excel not understanding some of the word macro commands. An excellent example of this is when I am trying to insert a page break as seen in the below code snippet:

'open word and create a new document
Dim wdApp As Object
Set wdApp = CreateObject("Word.application")
wdApp.documents.Add

'put some text into the document
wdApp.Selection.typetext Text:="Document title"
wdApp.Selection.TypeParagraph
'insert a page break
wdApp.Selection.InsertBreak Type:=wdPageBreak

I know the insert break command works fine because I can get it to work within a word macro. When trying to get excel to run it in word is another story. I get the following error message:

run-time error '9118':
Parameter value was out of acctable range

Debug
wdPageBreak = empty