Dr Web /opt/drweb/drwebd.real: cannot execute binary file

[Produccion]

Hi,

We've problems to start Dr Web in our Debian (lenny 5.0) machine.
Plesk Panel 9.5

/etc/init.d/drwebd start
Starting Dr. Web daemon...
/opt/drweb/drwebd: line 3: /opt/drweb/drwebd.real: cannot execute binary file
/opt/drweb/drwebd: line 3: /opt/drweb/drwebd.real: Conseguido

The antivirus has been running for years without problems and suddenly stopped working.
Someone can help me?

Thanks.