Upgraded to Ubuntu 12.04, ISPConfig 2 stopped working

[falko]

The only workaround I know is downgrading Ubuntu.

[hahni]

This is not a good news. I want to try it and it would be nice, if you could help me. In future i will use ISPConfig 3 for all other servers (like done for some ones). But this server must run with ISPConfig 2.

I modified the "/etc/debian_issue" to the 10.04.4 LTS-values to start setup. But the setup crashes with this error:

--
configure: error: Cannot find libmysqlclient under /usr.
Note that the MySQL client library is not bundled anymore!
ERROR: Could not configure PHP
--

On 10.04 the library is here:
--
./usr/lib/libmysqlclient.so.16.0.0
./usr/lib/libmysqlclient_r.so.16
./usr/lib/libmysqlclient.so.16
./usr/lib/libmysqlclient_r.so.16.0.0
--

On 12.04 it seems to be here:
--
./usr/lib/i386-linux-gnu/libmysqlclient.so.18
./usr/lib/i386-linux-gnu/libmysqlclient.so.18.0.0
./usr/lib/i386-linux-gnu/libmysqlclient_r.so
./usr/lib/i386-linux-gnu/libmysqlclient_r.a
./usr/lib/i386-linux-gnu/libmysqlclient.a
./usr/lib/i386-linux-gnu/libmysqlclient_r.so.18
./usr/lib/i386-linux-gnu/libmysqlclient.so
./usr/lib/i386-linux-gnu/libmysqlclient_r.so.18.0.0
./usr/share/doc/libmysqlclient-dev
./usr/share/doc/libmysqlclient18
--

Maybe there must be another symlink?