Loss of transactions

Hello,

Has anyone ever experienced that new created activities are gone or deleted in SAP CRM 5.0?

One of our clients has reported this problem. I have gone through the system log (SM21) and application log (SLG1) but cannot find anything that would hint on loss of data. Also the runtime error log (ST22) does not indicate a loss of data.

Are there other area's / tables or transaction code that might be useful to investigating this issue?

Thank you very mucht in advance.

Kind regards,

Norbert Hendriksen