TIFFs hanging in Windows Vista

Can someone help me with a stability issue between X3 photopaint and Windows Vista (32bit)?

When I try to open a 1bit black & white TIF (Group 4; not compressed; typically only about 1.5MB in size) Photopaint hangs without opening the image. I've updated both SP1 & SP 2 and have installed X3 with the default settings. A copy of the Windows error message:

Description:
  A problem caused this program to stop interacting with Windows.

Problem signature:
  Problem Event Name:    AppHangB1
  Application Name:    CorelPP.exe
  Application Version:    13.0.0.739
  Application Timestamp:    454d32ba
  Hang Signature:    3aa5
  Hang Type:    0
  OS Version:    6.0.6001.2.1.0.256.6
  Locale ID:    1033
  Additional Hang Signature 1:    5a23081bbbaed2333900d0f84eeea616
  Additional Hang Signature 2:    9b76
  Additional Hang Signature 3:    40958da9ff8186ac7a39e0ccf06a45f8
  Additional Hang Signature 4:    3aa5
  Additional Hang Signature 5:    5a23081bbbaed2333900d0f84eeea616
  Additional Hang Signature 6:    9b76
  Additional Hang Signature 7:    40958da9ff8186ac7a39e0ccf06a45f8

Can anyone suggest a solution?

Thanks,

Jim