Error when starting Autodesk Mudbox 2011

Hi,
I successfully installed Autodesk Mudbox 2011 but when I started it, this error happened. See the screenshot below. I tried reinstalling but I encountered the same error message. I searched the web and followed resolution by deleting the Mudbox folder and yeah it got fixed. However, the error randomly happened again. It seems that Mudbox crashes every time I use it.
Any advice to fix the problem?

Microsoft Visual C++ Runtime Library
Runtime Error!
Program: D:Program FilesAutodeskMudbox 2012mudbox.exe
This application has requested the Runtime to terminate it in an
unusual way.
Please contact the application’s support team for more information.
OK
