Lost data after server reboot

Lost data after server reboot

This weekend we rebooted our Servicedesk server. After the reboot I could not logon anymore. My collegue was able to login as technician but it seems we lost data of almost half a year!
 
How is this possible? We are running the following:
- Windows Server 2003 std
- Servicedesk 7.5.0 Build 7500
- MYSQL database
 
Any support is welcome, please help! Our helpdesk can not see the calls from the past half year.....
 
Jeroen van Lieshout
BTL Nederland B.V.

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