Add_drv doesn't recognize my driver..

Hi,
I removed mydriver file from /kernel/drv. Then add_drv mydriver.....is working and mydriver is loaded.
How come this is doing?
I ftped debug version of mydriver and overwritten on to the old one., then i did add_drv.....which is again loading the old version of mydriver.
Why is this happening? This is not happening on other machines.
Please let me know...how to overwrite with my debug version.
thanks
kiran

I removed mydriver file from /kernel/drv. Then add_drv >mydriver.....is working and mydriver is loaded.Is there any other copy in /usr/kernel/drv ?
As 'rule of thumb', I use 'rem_drv' instead of 'rm' for driver object modules.
Ashutosh

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