Texture fill limit

I have used Coreldraw  7 for many years with very few problems. Having recently switched fro Windows XP to Windows 7, I purchased Coreldraw X7 (Home & Student) and am rather disappointed by some of the problems I am encountering. In the old program I could create a large rectangle that almost filled the page, and completely fill it with a texture such as "Airbrush"  or "Neon Slice" with the bitmap resolution and maximum size set to (for example) 120 and 257 respectively. If I do the same thing in X7 I end up with several "tiles" in the fill pattern, and  changing the resolution and/or tile width makes no difference. Is this a bug, or a limitation, or am I doing something wrong? To add to the mystery,  if I create a large  texture-filled rectangle using my old Coreldraw 7, save the file, and then open it in X7, it is perfectly OK. It's only when I try to create the same thing from scratch in X7 that the problem occurs.