Activex plugin installation in 64bit IE

[haresh]

We compiled 32bit windows activex plugin to 64bit using VS2008 with x64
option in the project settings. It generated .ocx and dll file. Then we
created a cab file with inf file.
The inf file is as below.

; ========================= my.inf ========================

; This .inf file will control the installation of the MFC rac5vm
; control. This control has been compiled with Visual C++ version 4.2.
; The FileVersion tags in the dependent DLLs section on this file
; reflect this requirement.

[version]
; version signature (same for both NT and Win95) do not remove
signature="$CHICAGO$"
AdvancedINF=2.0

[Add.Code]
my.ocx=my.ocx
myl.dll=myl.dll
; These are the necessary supporting DLLs for MFC 4.2 ActiveX Controls
mfc90.dll=mfc90.dll
msvcr90.dll=msvcr90.dll
myl.dll=myl.dll
; thiscab is a keyword which, in this case, means that rac5vm.ocx
; can be found in the same .cab file as this .inf file
; file-win32-x86 is an x86 platform specific identifier
; See the ActiveX SDK - ActiveX Controls - Internet Component Download -
; Packaging component code for automatic download

[my.ocx]
file-win32-x86=thiscab
; *** add your controls CLSID here ***
clsid={CCA1618B-7D6E-4432-8FA4-3E01A1AD78A8}
; Add your ocx's file version here.
FileVersion=0,0,0,0
RegisterServer=yes

[myl.dll]
file-win32-x86=thiscab

; dependent DLLs
[msvcr90.dll]
; This is an example of conditional hook. The hook only gets processed
; if msvcrt.dll of the specified version is absent on client machine.
FileVersion=9,0,21022,8

[mfc90.dll]
FileVersion=9,0,21022,8

When i tried to install cab file. It crashes. Since it is crashing in the
installation stage we are unaware of debugging technique how to proceed
furthur.

please help me out here how to proceed furthur to debug this issue.