OD Receiver service stopping on rollback

System

we're getting very consistent crashes/stops of the OD service on the OD Receiver, under the conditions that the DNR fails and triggers a rollback of the transactional deployment...

OD Receiver => Version: 5.5.1 Build 11146 REL Interwoven 20020829 (Windows 2000 server)
OD Base => Version: 5.6.0.0.0 Build 15978 Interwoven 20030121 (Windows 2000 server)

the deployment section from the OD config file:
<deployment transactional="yes" >
<execDeploymentTask useDefinition="agent.com" >
<deployNRun>
<dnrDeployment location="source" when="after" state="success">
<script cmd="$dnrCommand^" async="no" />
</dnrDeployment>
</deployNRun>
</execDeploymentTask>
<execDeploymentTask useDefinition="www.com" />
</deployment>

the logs on the source side are complete, through rollback...the logs on the receiver side are incomplete, they cutoff/die right at the start of rollback, when the service stops...I can copy what little there is to here if it'll be helpful...

probably a version compatibility issue? but we can't upgrade the receivers to 5.6 quite yet, though this shouldn't be the problem...by any chance is this a known bug?

any help appreciated...

thanks,
-Rori