[pure:dyne] network manager and aptitude

[altern]

hi

couple of weeks ago i had a problem where my laptop went funny because i 
accidentally removed many packages when installing some new sutff.

now i realised that while fixing this the network manager i was using it 
is gone. I am trying to install it again but when i do aptitude install 
it wants to remove a huge list of packages most (big of the system). I 
tried with different ones (kwifimanager, network-manager) and it is the 
same with all of them.

i am checking the /etc/apt/sources.list and i see that most entries say
"lenny" while one says "unstable". This could be the problem? antonios 
said that recently lenny has changed from unstable to testing so i guess 
i am mixing different versions...

thanks

enrike