Scroll problems with adobe standard 11

I have windows 7, every time I select a pdf file from the document section and I try to scroll down to preview the document on the "file preview" and it cant be done.  However, I can open the document and be able to scroll with no problems.  I can also open other documents on the file preview window and I have no problems scrolling the document.  This just happens with adobe standard 11.  Please help