execute dts 2000 failuer

I have used to the execute dts 2000 task in Visual Studio to successfully execute a structured storage file for a simple DTS package.

I am trying to use the same method for another DTS package, which executes five other packages. I've tried both the 'structured storage' and 'embedded in task' methods pointing to the parent package but in debugging mode the execution immedately fails. When I execute the parent package in Management Studio, it successfully executes the five child packages. I am including the debugging message below, thogh it doesn't help me any. Does anyone know what the problem is?

SSIS package "BPSA_LOAD_ACCT_SUMMARY_NEW.dtSX" starting.
Error: 0x0 at Execute DTS 2000 Package Task: System.Runtime.InteropServices.COMException (0x80040427): Execution was canceled by user.
at DTS.PackageClass.Execute()
at Microsoft.SqlServer.Dts.Tasks.Exec80PackageTask.Exec80PackageTask.ExecuteThread()
Task failed: Execute DTS 2000 Package Task
Warning: 0x80019002 at BPSA_LOAD_ACCT_SUMMARY_NEW: The Execution method succeeded, but the number of errors raised (1) reached the maximum allowed (1); resulting in failure. This occurs when the number of errors reaches the number specified in MaximumErrorCount. Change the MaximumErrorCount or fix the errors.
SSIS package "BPSA_LOAD_ACCT_SUMMARY_NEW.dtSX" finished: Failure.

My misunderstanding.

I realize now that I have to execute the 5 DTS 2000 package tasks in the one 2005 project.

|||I have small info about this problem. The real message in the DTS(2000) package log (but no in SSIS "Execute DTS 2000 Package Task" on SQL 2005 Server!) is:
"Step Error Source:
Step Error Description:(1:"My DTS 2000 Task Name") SubStep 'DTSStep_DTSExecutePackageTask_1' failed with the following error:
Exception of type 'System.OutOfMemoryException' was thrown.
Execution was canceled by user.Exception of type 'System.OutOfMemoryException' was thrown.
Step Error code: 80040427
Step Error Help File:
Step Error Help Context ID:0"
And this problem interrelated, as i any more know, with parallel execution of nested packages on DTS ("Execute on main package tread" option).
If you are yet interesting this problem - answer me there or email on sas72@.rambler.ru