3com 4500 switch has startup cfg file = null?

hi all fellow experts,,
i have a problem in 3com 4500 that does not load the configuration file .. and it is loading with the default configuration ,,
i tried to configure it and save the configs and it does save successfully but when i reboot the switch it goes back to the Default config.
the most noticable thing is that
Startup save configuration file = null
next Startup save configuration file = flash:/config.cfg
and when i set the null to flash:/config.cfg it saves and when i reboot it goes back to null with the default config loaded.

 
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VCyrusAsked:
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jfradyCommented:
Could be the config file type.  Whether it is a backup file or config file.  In general you select the file to use for the next boot with the following command:
startup saved-configuration filename [ backup | main ]
where filename is the config file name and backup or main denotes whether it is a backup file or main config file.  Either type can be used as the startup config file
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VCyrusAuthor Commented:
thanks for the quick reply ,,,
i tried this command before as noted in my question ,, either way the main and backup denotes does not exist.
hope there is any other way.
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VCyrusAuthor Commented:
hi ,
i finaly found the solution ,,
i mistakely answered the bootrom option number 7 (NO)  .. and it booted itself back to the next Configuration file..

thanks for the help anyway.
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