cover sheet buildingblock

Hi
I have some templates that has a logotype on the first page (different first
page)
Document looks like
1 page - logotype in header and some text in document
2 page - no header some text in document
Now I have made a cover sheet with some text and pictures. What I would like
to happen is that the document should look exactly like before but with a
cover page, like:
1 page - cover sheet
2 page - logotype in header and some text in document
3 page - no header some text in document

But what happens is:
1 page - logotype in header cover sheet
2 page - no header and some text in document
3 page - no header some text in document

I now that this has to do with my different first page. So I tried to make a
cover sheet with a section break but it will not be saved in the building
block.
Any suggestions on howe to do?