Cannot load usbserial module on startup

I am trying to load usbserial module at startup by adding the following lines to post-boot

Code:

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/sbin/insmod usbserial vendor=0x12d1 product=0x1412

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But it does not get loaded after the router has booted. If I execute it manually in an ssh window, it gets loaded without any problems. Is there some other way to load kernel modules? I am trying to get this to work on the 1.9.2.7-d-r1222 Oleg firmware.

Thanks.

I moved the call to post-mount and it is now working fine.