E32 means that there's a problem with the image stabilizer (it's probably not working).
You can use the following Lua script to prevent camera shutdown:
call_event_proc("Mecha.Create")
call_event_proc("StartImStEventProc")
call_event_proc("DisableISDriveError")
Copy these lines into a text file named like "e32fix.lua", and execute it each time you switch the camera into record mode. You need
CHDK 1.2 to run the script, and you need to enable "Lua native calls" in the Misc. menu.
You could also get a special CHDK build that doesn't need this script, if you tell me your camera's firmware version.