No service user password found for Adapter Engine

Hi all,

I have a problem with XI 7.0. One hour ago we get the next message in XI :

<SAP:Code area="INTERNAL">AE_DETAILS_GET_ERROR</SAP:Code>

<SAP:P1 />

<SAP:P2 />

<SAP:P3 />

<SAP:P4 />

<SAP:AdditionalText>Error while reading from the secure store: ERROR_U: No service user password found for Adapter Engine</SAP:AdditionalText>

<SAP:ApplicationFaultMessage namespace="" />

<SAP:Stack>Error while reading access data (URL, user, password) for the Adapter Engine</SAP:Stack>

<SAP:Retry>N</SAP:Retry>

This error one takes place when communication channel receiver is executed. The business scenario is R3 -> XI - > R3. Always it has working except today.

Thanks in advanced

Ivá