Excel4 API call with Office 2010 64-bit

Question

Hello, I try to convert an existing 32-bit XLL to a 64-bit version in order to run under Excel 2010 64-bit. But when I try to run it under Excel it crashes Excel.

It crashes when I do a Excel4(xlfRegister, result, 7, x0, x1, x2, x3, x4, x5, x6); with XLOPER parameter (not XLOPER12). Do you know if I can still use Excel4 in 64-bit ? If it is thus to still use XLOPER ?

Not that when I made a simple Excel4(xlfGetName, result, 0); it works fine.

Thank you for you help.