Here is your problem
Uitpakken van mysql-server-5.0 (uit .../mysql-server-5.0_5.1.30really5.0.75-0ubuntu10.2_i386.deb) ...
debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Hulpbron is tijdelijk onbeschikbaar
Basically it is kind of a temporary glitch. If you reinstall mysql-server you should be fine.
I'll be marking this report as a duplicate, since the issue in question is already triaged in bug #349469.
Here is your problem
Uitpakken van mysql-server-5.0 (uit .../mysql- server- 5.0_5.1. 30really5. 0.75-0ubuntu10. 2_i386. deb) ...
debconf: DbDriver "config": /var/cache/ debconf/ config. dat is locked by another process: Hulpbron is tijdelijk onbeschikbaar
Basically it is kind of a temporary glitch. If you reinstall mysql-server you should be fine.
I'll be marking this report as a duplicate, since the issue in question is already triaged in bug #349469.