I've just got a respond from John and thats what he says ?
Hello,
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I checked our binary.. and it seems to be working fine with mysql 4.1.11 ...
I checked your license and it was set to ES3. I've updated your license to ES4.. so try installing it now (you'll get new binaries). That might have been the original problem.
Thank you,
John
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I will try installing Centos OS 4.0 today and let see what happends.