M4L Patch made on Mac crashing Live on Win...

Hi ! I made a patch working perfectly on Mac but I tested it on Windows and it makes Live crash every time I load it... When I unfreeze the device it seems externals are not uncompressed in the "max for live devices" folder in the "max 8" folder... It seems to work if I add manually an "externals" folder with both .mxo and mxe64... Is there specific action to do to get crossplatform thing working well ? Thanks for your help !