can not load a DLL file-Collection of common programming errors

The first and second links that Google produces for this error both suggest it is commonly caused by runtime library versioning. Both predate VS2010, but I would start by looking for a similar problem. Have you tried duplicating the analysis steps described in that first post?

(Is the DLL something that you have created? If not, maybe it actually was built with VS2008 and corresponds exactly to that post? If so, maybe you can try the compilation tweaks recommended there.)