Could not open macro storage while opening a word document

Issue:
When I am opening a word document or a template from an ASP.NET Web
page (language used VB.NET Visual Studio Version 2003) using
Word.ApplicationClass object (Reference Word 11.0 object Library), I am
getting the following error:

could not open macro storage (System.Runtime.comExeception)

I am not getting any errors while opening the same word document or a
template from a windows application. (Language Used VB.NET)

Purpose:
To generate correspondence letters in word format by merging data from the
database into corresponding form fields in word. (Using a word template)

Thanks in advance

Reply at the earliest