Backup fails to execute

Is there anything else in logs under 'events' switch position? Or in logs of particular failed activity -- select backup plan, open 'history' tab, double-click failed activity, its detail will open, select 'log' section.

Here is the rest:

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Log Entry Details
--------------------
Type:          Error
Date and time: 8/15/2012 9:34:54 AM
Backup plan:   [None]
Task:          [None]
Code:          20,250,627(0x1350003)
Module:        309
Owner:         administrator
Message:      
  TOL: Command 'Backing up' has failed.
Additional info:
--------------------
Error code: 3
Module: 309
LineInfo: 4a8728dc8a1c94f8
Fields:
Message: TOL: Command 'Backing up' has failed.
--------------------
Error code: 22
Module: 309
LineInfo: 8d165e86fb819606
Fields:  TraceLevel : 1
Message: TOL: Failed to execute the command. The 'Backing up' command backs up the specified data to the specified location.
--------------------
Error code: 3
Module: 329
LineInfo: 1cd98aae889424f9
Fields:
Message: Backup has failed.
--------------------
Acronis Knowledge Base: http://kb.acronis.com/errorcode/

Event code: 0x01350003+0x01350016+0x01490003

--------------------

AND

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Log Entry Details
--------------------
Type:          Error
Date and time: 8/15/2012 9:15:42 AM
Backup plan:   [None]
Task:          [None]
Code:          66,038(0x101F6)
Module:        1
Owner:         backup
Message:      
  Operation with partition '0-0' was terminated.
Details:
Failed to create volume snapshot.

    Error code: 0x70021
    $module = "C:\Program Files (x86)\Acronis\BackupAndRecovery\DiskBundle.dll"
    Tag: 0xDF81DA2C74EC5084
Failed to unlock the volume snapshot.

    Error code: 0x10C443
    Tag: 0x14181C22EF45AFC7
The device is not ready

    Error code: 0xFFF0
    code = 2,147,942,421 (0x80070015)
    Tag: 0xBD28FDBD64EDB8BC
Additional info:
--------------------
Error code: 502
Module: 1
LineInfo: a164035b3ff39287
Fields:  $module : C:\Program Files (x86)\Acronis\BackupAndRecovery\DiskBundle.dll
Message: Operation with partition '0-0' was terminated.
Details:
Failed to create volume snapshot.

    Error code: 0x70021
    $module = "C:\Program Files (x86)\Acronis\BackupAndRecovery\DiskBundle.dll"
    Tag: 0xDF81DA2C74EC5084
Failed to unlock the volume snapshot.

    Error code: 0x10C443
    Tag: 0x14181C22EF45AFC7
The device is not ready

    Error code: 0xFFF0
    code = 2,147,942,421 (0x80070015)
    Tag: 0xBD28FDBD64EDB8BC
--------------------
Error code: 33
Module: 7
LineInfo: df81da2c74ec5084
Fields:
Message: Failed to create volume snapshot.
--------------------
Error code: 50243
Module: 16
LineInfo: 14181c22ef45afc7
Fields:
Message: Failed to unlock the volume snapshot.
--------------------
Error code: 65520
Module: 0
LineInfo: bd28fdbd64edb8bc
Fields:  code : 2147942421
Message: The device is not ready
--------------------
Acronis Knowledge Base: http://kb.acronis.com/errorcode/

Event code: 0x000101F6+0x00070021+0x0010C443+0x0000FFF0

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Any ideas or should I try a different backup program. I'm told Arcserve and Backup Exec are the best on the market.

I've fixed the issue. I uninstalled Acronis and installed Symantec Backup Exec. Works like a charm now.