System Lock pin code

Hi,
My mac is asking me for a 6 digits System Lock pin code to peform a clean install (booting from a USB drive) .   My security pin code has 4 digits, not 6 but it seems that the screen doesn't allow me to type in only 4.
Had you seen this before?  any workaround or fixes ?
Thanks in advance

Also,  If I boot up the mac using my Snow Leopard installation disk, it works and by-passes this screen which doesn't look good (safe?) to me as I can by pass the code and peform a Mac OSX clean installation.
By the way, theare are 2 codes involved here ,  the firmware password (any character)  and the system lock pin code (only numeric digits) .
I have no problem with my firmware password as my mac accepts it with no problem.  The problem is that system lock 6 digits pin-code when I chose only a 4 digits one.

Similar Messages

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