Problem on FreeBSD 5.3 after source upgrade

[Stroopsmoel]

I had CS:S running on my FreeBSD 5.3 server without problems.
After restarting the server the source dedicated server files were upgraded to version 59.
After that it wouldn't start.
The error message is "Unable to determine CPU Frequency".
I've tried using -binary srcds_i686 but this won't help. Any clues ?

srcds_run output :

Auto detecting CPU
Using SSE2 Optimised binary.
Auto-restarting the server on crash
Unable to determine CPU Frequency


Thanks...