GeneratePageThumb crash on 64 bits

Hello,
i am using this function and Works fine in 32 bits application, but i need to run it on 64 bits.

Exception:
An unhandled exception of type 'System.BadImageFormatException' occurred in GhostscriptSharp.dll

Additional information: Se ha intentado cargar un programa con un formato incorrecto. (Excepción de HRESULT: 0x8007000B)

Could you help me?
Thanks