X64 linker errors

I added walkabout to 3.6.2 and compiled for X32 which worked perfectly. Then, i changed the to X64 as described on the Torque3d.org site, but I get always a linker error.

I used These instructions:

Targeting 64-bit Windows

Please follow these instructions once you have generated a project to target 64-bit platforms. After performing that, you'll also need to update several file-specific compile instructions. There are a number of assembler files in the repository which need to be edited. Right-click on each assembler (.asm) file, then edit the custom build command to use win64 instead of win32.

This is the error I got:

Error 68 error LNK1112: module machine type 'X86' conflicts with target machine type 'x64' D:DownloadsTorque3D-3.6.2Torque3D-3.6.2My ProjectsTestbuildFilesVisualStudio 2010projectsx64ReleasemMathAMD_ASM.obj 1

Error 70 error LNK1181: cannot open input file 'D:DownloadsTorque3D-3.6.2Torque3D-3.6.2My ProjectsTestbuildFilesVisualStudio 2010x64ReleaseTest DLL.lib' D:DownloadsTorque3D-3.6.2Torque3D-3.6.2My ProjectsTestbuildFilesVisualStudio 2010projectsLINK



I guess i made some mistake when editing the asm files. What exactly do i have to Change? I use VS2013, and I don't see this custom build command...where do i find this exactly? Did anybody succeed in compiling for X64 using the instructions from above?