NIS 2008/09 inhibit downloading of transactions in Quicken 2007

I am certain there is a conflict between NIS 2008/09 and Quicken 2007 on my system and I am soliciting advice. OS is XP Pro SP3, Quicken is 2007 Deluxe with R5.

Performed the following steps:

  1. Uninstalled NIS 2007 (wishing to use newer version) and used NRT to remove all.
  2. Installed NIS 2009 successful. All seems to be ok except can’t download bank transactions in Quicken.
  3. Tried all conceivable tinkering with NIS but no help.
  4. Uninstalled NIS 2009 and used NRT. Tested Quicken all works fine.
  5. Installed NIS 2008 successful. All seems to be ok except can’t download bank transactions in Quicken.
  6. Tried all conceivable tinkering with NIS but no help.
  7. Uninstalled NIS 2008 and used NRT. Tested Quicken all works fine.
  8. Installed NIS 2007 successful and Quicken works fine.