Opening MathCad sheets from Sharepoint

Hi,

We are trying to upload all our standard calculations to sharepoint. I have uploaded them as .XMCD files however when you click on the link the files do not open correctly and there is an error.

We can download the copy which then opens but opening the link directly from sharepoint does not work.

We are using MathCad Version 15.0 although some of the MathCad sheets were created in MAthCad 14.0.

We are using Sharepoint 2010.