Procurve 2810 firmware update failed

[BugBus]

Hi,

I've got a ProCurve 2810g (J9022A) that is currently running

Image stamp:    /sw/code/build/bass(bh2) 

               Oct 21 2008 16:33:39
               N.11.15
               25
Boot Image:     Secondary

This is quite an old release but updating any newer release fails during verification.

Even copying the working secondary flash to primary fails:

 copy flash flash primary  
Flash-to-flash copy of product code failed.

The releases I tried were .15 .25 .52 .73 .74 .75 and .76

Is there any special update procedure required?

Thanks for your help!