Custom connection manager breaks meta data in package

[Badgers]

Hi

I have build a custom connection manager of which is consumed within a number of ssis packages.

I have added an additional field/property to the custom connection manager, when I build and release it, it breaks all my existing ssis packages saying there is no property - referring to the one I just added.

I can get around this, by adjusting the package meta data and adding the xml, but this is wrong, does anyone know how to automatically upgrade this...?

Thanks inadvance.