You have Debian, and for your good, you should only install debian software. Therefore, no more source install.
For new and recent software, you must change you /etc/apt/sources.list file and insert the testing, or unstable mirror, and install the software from them, throw apt.
for instance, to install apache2, add "deb
http://ftp.ua.pt/debian testing main" and "deb-src
http://ftp://ftp.ua.pt/debian testing main".
then run apt-get update && apt-get install apache2 and mysql and other.
Then, coment both the lines. and run apt-get update.
It's imperative that you only use debian's reporitories packages in way too maintain your debian installation stable and optimized.
sorry for my rusty english.
If you have more doubts, be free to mail me: gass (at) otiliamatos (dot) ath (dot) cx.
the mailserver is currently down, it will be up after 19th january.
Gass