Task scheduler - problem

Hi all,

I have a problem with task scheduler in Acronis Recovery for Microsoft Exchange.

I am using Microsoft SBS 2008 sp1, and i have on it Exchange 2007 sp1.

My problem is that every night scheduled task for the backup server is failing to finish, so every morning I have to manually start it. I changed the backup schedule, because I thought it was not working because of overlap with other backup plans, however, I left only one full backup to run at 03:00 am, and a cleanup job that runs at 1:30 am, but still every morning when I look at the task it is in running condition.

If, on the same day, i do not force stop-process command, the backup is on failure to perform the next day. When, through the console, i do "stop running task" i can no longer open the "manage tasks" in the console, and I have to do "end task" of the console.

I learned that the problem is in task scheduler in two ways.

First one is error in application log of windows server:
Log Name: Application
Source: Application Error
Date: 5/15/2012 3:18:25 AM
Event ID: 1000
Task Category: (100)
Level: Error
Keywords: Classic
User: N/A
Computer: My server Name
Description:
Faulting application TaskService.exe, version 1.0.0.42, time stamp 0x48ee272f, faulting module ntdll.dll, version 6.0.6001.18538, time stamp 0x4cb733e1, exception code 0xc0000005, fault offset 0x0001e4c2, process id 0xb374, application start time 0x01cd32360e63d828.

Second one is when i try to uninstall "messaging api and collaboration data objects 1.2.1", i got message "the following applications should be closed before continuing the install - Acronis task Service (process id: PID number)". if i cancel uninstall and kill Acronis Task Service, i can use console again, but i have to schedule task again.

Although in acronis log say "succeeded to create full backup of storage group 'First Storage Group'(database(s): 'Microsoft Database') from Microsoft Exchange server 'server name'.", my backup file have 0 bytes. In same task i have e-mail notification enabled, but i do not receive any notification because task stay in running state.

On the same server i have Acronis recovery for MS sql server that works without problem.

I have tried to change schedule many times, i have changed schedule of maintanace of exchange databases, i have reinstalled all acronis applications on server but still i have same issue.

Does anybody have idea how to resolve this issue??

thanks in advance, sorry if my english is bad, it is not my nativ language.