I am working on Ubuntu 9.10 + LXDE as my current project.

I am finding it difficult to install any new packages on this OS. For example, I need to install OpenCv package for qt webcam application, but every time it gives unmet dependencies error.And when i try to install dependencies it again show some more dependencies and so on and forms a circular loops.

for example:

sudo apt-get install libcv-dev
..
....
The following packages have unmet dependencies:
 libcv-dev: Depends: libhighgui-dev (=1.0.0-6.2ubuntu1) but it is not going to installed.
E: Broken packages

Then I try to install libhighgui-dev as follow:

sudo appt-get install libhighgui-dev
..
...
The following packages have unmet dependencies:
libhighgui-dev: Depends: libgtk2.0-dev but it is not going to installed
E: Broken packages

And this goes on never ending.

Please suggest me something, as i have googled a lot and did not found any help.

It may be , i m missing some primary packages to be installed.But how to find it?

Any suggestion/help/link will be really appreciated.

Thanks in Advance.