Loose Bootpath after replacing the UGUY

[azebabad]

hello,
I have a SD64 and I have replaced the UGUY on CAB1.
I tried to start Partition 1 wish contains 2vpars but I get the following error :
"Loading.: HP-UX Primary Boot: 8/0/2/1/0/4/0.4.6.0.0.0.1
Load of HP-UX Primary Boot: 8/0/2/1/0/4/0.4.6.0.0.0.1 failed: Not Found
Press any key to continue "
My boot disks are on a EVA5000
anybody can help ?
P.S:one of my colleague dealed already with that kind of pb (it can be resolved with something related to "drvcfg" command at EFI shell but he don't remember exactly the procedure.