JSI Tip 5033. List of Limitations in 64-Bit Windows.

Microsoft Knowledge Base Article 282423 contains the following description:

This article lists some limitations in 64-bit Windows. No Mixed 64-Bit/32-Bit Processes 64-bit programs cannot load and call 32-bit MDAC.64-bit Microsoft Internet Explorer cannot load 32-bit ActiveX controls.The 64-bit shell cannot load 32-bit...