Database Software

I have created a custom workflow. I am trying the upload in the testing instance using the concurrent program Workflow Definitions Loader in update mode.
I am getting the following error log:
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Application Object Library: Version : 11.5.0

Copyright (c) 1979, 1999, Oracle Corporation. All rights reserved.

FNDWFLOAD module: Workflow Definitions Loader
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Current system time is 20-JAN-2010 09:42:06

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wferr:
- 1602: Could not save.
- 1400: Could not save to database. MODE=UPLOAD EFFDATE=<null>
- 1406: Workflow definition contains unsupported feature, cannot be uploaded to this database.
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Start of log messages from FND_FILE
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End of log messages from FND_FILE
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Executing request completion options...


Output is not being printed because:
The print option has been disabled for this report.


Finished executing request completion options.

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Concurrent request completed
Current system time is 20-JAN-2010 09:42:07

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Oracle Workflow Definition Loader 2.6.4.0.

Access level: 100, Mode: UPLOAD
Unsupported type EVENT in attribute XXOWWIRC/EVENT_MESSAGE
Unsupported type EVENT in activity XXOWWIRC/CANDIDATE_REGISTRATION
Unsupported type EVENT in activity XXOWWIRC/CREATE_APPLICATION
Unsupported type EVENT in activity XXOWWIRC/CREATE_IRC_ASG_STATUS
Unsupported type EVENT in attribute IRC_GET_XML_VALUE/EVENT
Unsupported type EVENT in attribute COMPAREEVENTPROPERTY/EVENT
Unsupported type EVENT in attribute GETEVENTPROPERTY/EVENT
Unsupported type EVENT in attribute SETEVENTPROPERTY/EVENT
Unsupported type EXTJAVA in function WFSTD/XMLCOMPAREDATE
Unsupported type EVENT in attribute XMLCOMPAREDATE/EVENT
Unsupported type EXTJAVA in function WFSTD/XMLCOMPARENUMBER
Unsupported type EVENT in attribute XMLCOMPARENUMBER/EVENT
Unsupported type EXTJAVA in function WFSTD/XMLCOMPARETEXT
Unsupported type EVENT in attribute XMLCOMPARETEXT/EVENT
Unsupported type EXTJAVA in function WFSTD/XMLGETTAGVALUE
Unsupported type EVENT in attribute XMLGETTAGVALUE/EVENT
Unsupported type EXTJAVA in function WFSTD/XMLTRANSFORM
Unsupported type EVENT in attribute XMLTRANSFORM/EVENT
Unsupported type EVENT in attribute XMLTRANSFORM/NEWDOCUMENT


Note : The same concurrent program is uploading this work flow without any error in the Development instance.

Access level information is following:
Acess Level : 100
Check box Allow modification of customized object is not checked.
For all the workflow entities access tab information is following:
customization level : 100
Access Level : 100
Protection Level : 100
Option Preserve customization is checked
Option lock at this access level is checked.

Please suggest

Regards
Devender Yadav