Add-in doesn't work in 64 bits operation system

Hello

I made many add-ins for Solidworks Enterprise PDM and all of them work well in 32 bits operation system

But doesn't work in 64 bits operation system

I made its add-ins in a machine with Windows XP 32 bits and I need to work in a machine with Windows 7 64 bits

Anyone could help me?

Thanks

SolidworksSolidworks Pdm enterprise Pdm