maybe your graphics card hates you?
you're absolutely certain that construction history is turned on?
have you tried starting again?
and yes, you should be able to change the subdivisions afterwards from the channel box
that's a "Ch" pronounced as a "K"
Computer skills I should have:
Objective C, C#, Java, MEL. Python, C++, XML, JavaScript, XSLT, HTML, SQL, CSS, FXScript, Clips, SOAR, ActionScript, OpenGL, DirectX
Maya, XSI, Photoshop, AfterEffects, Motion, Illustrator, Flash, Swift3D