unable to upgrade motorola firmware

Hi

I am trying to upgrade some motorola cable modems

sb6180
sb6182
sbg6580

I got the firmware from the arris web site.

I extracted the cvc from the firmware as explained in another site.

I tried to make a config file and it doesn't work

I also tried to send snmp commands and it desn't work

the file look like this

Main
{
NetworkAccess 1;
SwUpgradeServer 172.16.0.21;
SwUpgradeFilename "SB6180-3.2.1.0-GA-00-252-NOSH-NNDMN.p7";
SnmpMibObject docsDevSwAdminStatus.0 Integer 2;
SnmpMibObject docsDevNmAccessStatus.1 Integer 4; /* createAndGo */
SnmpMibObject docsDevNmAccessControl.1 Integer 3; /* readWrite */
SnmpMibObject docsDevNmAccessCommunity.1 String "private" ;
SnmpMibObject docsDevNmAccessStatus.2 Integer 4; /* createAndGo */
SnmpMibObject docsDevNmAccessControl.2 Integer 2; /* read */
SnmpMibObject docsDevNmAccessCommunity.2 String "public" ;
MfgCVCData 0x308203A130820289A00302010202106842CB72AC75DDBECF17A455F79A19E1300D06092A864886F70D0101050500308197310B300906035504061302555331393037060355040A133044617461204F766572204361626C65205365727669636520496E746572666163652053706563696669636174696F6E7331153013060355040B130C4361626C65204D6F64656D73313630340603550403132D444F43534953204361626C65204D6F64656D20526F6F7420436572746966696361746520417574686F72697479301E170D3031303731313030303030305A170D3231303330323233353935395A3065310B3009060355040613025553311D301B060355;
MfgCVCData 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
MfgCVCData 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
MfgCVCData 0xED05929FAC6F57E1C195EF214A616CA02900EAAA88D7F2E49A7D954162E867A9B8E84C58904944CDE2360B8542E67DD412CFE171FC881E92AE4AD7964D04ABC5CFF73C248FC14399FFEBC00288EA773A8C3F6068D7CF96E74B6690D05250BAF9D3DFBC7C2766718A04A07B350311EE794D51256587923BB503C2FD010BFF4710E1DC3C2C708A40900DF0C1643D06548803883322D3D5CBA25AC90B4644FDA11253FF33201F3670052DAC4E ;
ClassOfService
{
ClassID 2;
MaxRateDown 6400000;
MaxRateUp 5120000;
PriorityUp 1;
GuaranteedUp 0;
MaxBurstUp 0;
PrivacyEnable 0;
}
MaxCPE 1;
/* CmMic e0b803326b7aab375d99be06c7fe0c2c; */
/* CmtsMic c35ec8c0a5ebe0c6e6149bd74957f7c3; */
/*EndOfDataMkr*/
/* Pad */
}

when I try with snmp I do this

snmpset -v 2c -c private $IP SNMPv2-SMI::mib-2.69.1.3.1.0 a 172.16.0.21
snmpset -v 2c -c private $IP SNMPv2-SMI::mib-2.69.1.3.2.0 s SB6180-3.2.1.0-GA-00-252-NOSH-NNDMN.p7
snmpset -v 2c -c private $IP SNMPv2-SMI::mib-2.69.1.3.3.0 i 1

the first 2 commands work but the last one doesn't

# snmpset -v1 -c private 10.242.66.25 SNMPv2-SMI::mib-2.69.1.3.3.0 i 1
Error in packet.
Reason: (badValue) The value given has the wrong type or length.
Failed object: SNMPv2-SMI::mib-2.69.1.3.3.0

if I put the value "2" the command works

# snmpset -v1 -c private 10.242.66.25 SNMPv2-SMI::mib-2.69.1.3.3.0 i 2
SNMPv2-SMI::mib-2.69.1.3.3.0 = INTEGER: 2

but that doesn't help

any clue what I am doing wrong ?

thanks

Patrick