Custom addin wont load - SWX 2012

We are testing SWX 2012 and I have a custom addin that will not load.   It works fine in SWX 2010.   It shows up in the SWX 2012 Addin menu but it will not load when the check box is checked.  An odd thing that I notice is the path to the dll.  Instead of C:\Addins\MyAddin.dll   its C:/Addins/MyAddin.dll

I tried registering the dll again, no luck.

Any ideas how to fix this?

SolidworksApi macros