Cable Forum - Critical(3) StartedUnicast MaintenanceRanging -No Response received Every 10 Mins!!

Hi

I've had previous posts on this issue but with no means of resolution

The Problem

My modem resets itself up to 30 times a day!
Trying to MMO or Work from home is practically impossible
I'm losing the will to live

What I've done to try and resolve the problem / ruled out

Bought a brand new Router
Contacted Virgin Technical Support at least 10 times
Had Virgin fit a brand new 256 Modem
Had a dimmer fitted
Tried a direct connection from modem to PC
Tried 3 different PCs
Used my PC on 3 different networks
Tried using a direct coaxle connection from wall to Modem
Used different combinations of cable lengths, splitters and dimmers to try the modem with the following Download Power levels:
+2-5
+4-7
+9-13
+13-15

I have tried all of these things. But the reason in my opinion is:
My CMTS trying to upgrade my modem!

The following log appears in my modem log at intervals of as short as every 7 minutes every single day:

Mon Jul 14 19:12:33 2008 Critical (3) Started Unicast Maintenance Ranging - No Response received - ...
Mon Jul 14 19:03:55 2008 Information (7) CableModem software upgrade failed
Mon Jul 14 19:03:55 2008 Error (4) SW upgrade Failed after download - Incompatible SW file
Mon Jul 14 19:03:55 2008 Information (7) SW dload: Invalid image signature!
Mon Jul 14 19:03:53 2008 Notice (6) SW Download INIT - Via Config file cmreg-ntlhm250-mid.cm
Mon Jul 14 19:03:53 2008 Information (7) CableModem software download started
Mon Jul 14 19:03:53 2008 Information (7) Software upgrade has started.
Mon Jul 14 19:03:52 2008 Information (7) A software upgrade filename was specified in the config file.
Mon Jul 14 19:03:52 2008 Information (7) Authorized
Mon Jul 14 19:03:51 2008 Information (7) Registration complete!
Mon Jul 14 19:03:51 2008 Information (7) We registered with a DOCSIS 1.0 config file!
Mon Jul 14 19:03:51 2008 Information (7) Received a REG-RSP message from the CMTS...
Mon Jul 14 19:03:51 2008 Information (7) Sending a REG-REQ to the CMTS...
Mon Jul 14 19:03:51 2008 Information (7) CableModem SNMP configure complete
Mon Jul 14 19:03:49 2008 Information (7) IP init completed ok
Mon Jul 14 19:03:49 2008 Information (7) CableModem TFTP init ok
Mon Jul 14 19:03:49 2008 Information (7) CableModem DHCP client init ok
Mon Jul 14 19:03:49 2008 Critical (3) DHCP WARNING - Non-critical field invalid in response.
Mon Jul 14 19:03:37 2008 Information (7) MAP w/initial maintenance region received
Mon Jul 14 19:03:37 2008 Information (7) Downstream sync ok
Mon Jul 14 19:03:37 2008 Information (7) Beginning initial ranging...
Mon Jul 14 19:03:37 2008 Information (7) downstream time sync acquired...
Mon Jul 14 19:03:37 2008 Information (7) Downstream sync ok
Mon Jul 14 19:03:36 2008 Information (7) starting ds time sync acquisition...
Mon Jul 14 19:03:33 2008 Information (7) Locked on the downstream. Waiting for UCDs...
Mon Jul 14 19:03:33 2008 Information (7) Downstream lock ok
Mon Jul 14 19:03:32 2008 Information (7) Sync Start
Mon Jul 14 19:03:30 2008 Critical (3) Received Response to Broadcast Maintenance Request, But no Un...
Mon Jul 14 19:03:30 2008 Information (7) Reset downstream scanning state!
Mon Jul 14 19:02:58 2008 Critical (3) Started Unicast Maintenance Ranging - No Response received - ...

My friend has a virgin broadband connection 6 miles away with no problems what so ever. I looked at his log and the last time he had this message was over 2 years ago! I could live with that no problem!

I have an engineer coming to look tomorrow. What do I tell him!!!!!

please please help (I'm even writing this in notepad in case my connection goes again!!)

---------- Post added at 20:44 ---------- Previous post was at 20:35 ----------

FYI. It is no coincidence that every single time I lose my connection, the UNICAST maintenance has started which I can see in my event log (down to the very second!) including this second in fact. It's doing it again as we speak!